If you would like to go through other iGCSE Maths topics in depth, check out the All of iGCSE Playlist here : ua-cam.com/play/PLYNwTLhq9xZbbYnEipbmqFWb4b-NpOkpd.html Check out my iGCSE Maths Paper 2 Exam Workshop, where I go through the five most crucial topics you need to know in a revision day style format: www.udemy.com/course/igcse-0580-maths-paper-2-exam-workshop/?referralCode=14EF4EDB1E2914A6B29F
Me : having difficulties with a topic *searches Ginger mathematician + that topic * *watches video * Attempt past question and I don’t fail a single one ! A true blessing you areeee
I've never seen Maths explain better in this life before. This is fantastic, you explain so detail, soft, and calm that I am starting to love Arithmetic, Geometric and so on sequence/series. Thank you massively helping everyone watching your video!!
you make me so happy. your way of explaining makes it all easy for me to understand, as I was struggling alot with this topic and had no idea how i'd ever be able to learn all about it. thank you so much for providing us with such easy yet defined explanations, you have no idea how much this helps. ♥
@@PoomiestPoom It's actually more of a re-arranging than a square sequence question. I struggled for a whole 25 minutes on that single question but the key is to list simultaneous equations (I think, I'm not sure...)
This topic has always made me lose marks but this guy has helped me so much 🥰. I recommend my friends watching your videos, you're truly the best teacher I've seen so far. Keep going sir
thats so much for releasing these vids i have the the exam in like uhhh 4 days and im stressing myself out too much. i might actually pass because of you :)
This is the first time i understood sequences. Thank you so much, I love your videos . I have my maths paper 22 tomorrow , and I can't tell how helpful this is
I literally love your videos so much! I understand the topic so much better all thanks to this video. Could you please make a video like this on indices
I don't know if you watch jujutsu kaisen, but you're literally the maharoga to my megumi, oh my god. i have mocks in 2 weeks and i've never felt so prepared after watching your videos and following along man. You're the best!
Thanks for the great video! I tried looking for your PPT file for this Sequence questions. Would you be so kind to share the file as you usually do for the other types of questions? Thanks again, it's been a great help to me!
Thank you so much for the video, Mr. Mathematician. Sorry, I couldn't quite understand what you meant by what you said here, at 19:36, what does doing the numerator separately as an nth term and the denominator separately as an nth term mean?
Glad I could help Joanna! If you'd like further help on any iGCSE Maths topic, do use the playlist here :-) : ua-cam.com/play/PLYNwTLhq9xZbbYnEipbmqFWb4b-NpOkpd.html
Hey! Thanks for the video. But I noticed you haven’t covered this type of sequence right: 3,5,9,17,33 As it doesn’t have either a 1st, 2nd or 3rd difference. But I’m not sure how to solve it Thanks
hii there, I'm not sure if its called geometric progression or not but this is how you do it: so I assumed you found the difference right? 3 - 5 - 9 - 17 - 33 { sequence } 2 - 4 - 8 - 16 { second difference } 2 4 8 { third diff} if you notice, you can see the SECOND difference are *square numbers* ( square numbers are just 2^1, 2^2, 2^3 and so on ) so then your 'n' will be the placed as the power of the base number 2 = 2^n after this you can subtract the difference between the sequence and square number and BEHOLDDD you find a difference of 1! soooo your sequence will be 2^n + 1 I hope this helps!!
Sir at 13:48 , for the b part, you said we have to see whether n is an whole number, so if we get n as 0, will it still be no or yes? Please answer fast, I have my test in 4 hours
Hello, I used your videos this year to read for my math Igcse and I got an A* . Thank you so much I am currently in my first year university studying medicine ! Just remembered you and wanted to tell you how much you have really helped me .
words cannot explain how helpful this is 🥹🥹🥹 i struggled so much with sequences in year 9 but after watching this im alot more confident ahh hope my test goes well tomorrow!!!thank youu
Help! Tomorrow I have the IGCSE of math and I don’t understand this exercise. Nth term of the sequence 4,10,18,28 I do it like you do it, the second difference is 2. Then as you do in the video, I subtract the original sequence with the 1n^2 and it gives different numbers. Not a consist one, it gives me 3,6,9,12 what should I do???
That is the perfect method to find the nth term of a quadratic sequence. After obtaining 3,6,9,12… you would simply find the nth term of this new sequence (3n) and add it to the initial n^2. You would then get the nth term for the initial sequence to be n^2+3n, which is exactly what the question gives us 👍
Just in summary, (i am little confused here, i would be great if you could help me out with this) at time 2:39 you mentioned that for quadratic equation, divide the difference by 2 and at time 17:21 you said that for cubic equation, difference should be divided by 6. That means, whatever the difference is , ex. 4 as second difference i would still divide it by 2 and if 4 is my third difference, i would still divide it by 6, right? Thank you.
One more thing I wanted to ask... in quadratic sequence I did a qn in which I got the 2nd difference as 3 so I did 3/2 n^2 for the first 4 terms and then subtracted it from the original sequence. However, the answer that I got after subtracting wasn't the same. ForExample in 4:02 you got the subtracted answer as 3 for each but I got different.... That's where I get confused, kindly let me know what to do for those types of qns... and thank you for your previous reply sir! Glad to have a teacher like you!
@@GingerMathematiciandoesn’t make sense though? Once you compare the sequence to the cube numbers, subtracting one from another gives different values: -2, -8, -20, -38, -62. So what’s next?
For the nth term that’s involved with the second and third difference do we always divide by the number it’s self before writing down the square numbers or cube numbers and find the difference?
Nice! I have my igcse in this may series so like a week or so to go. I've just been binge watching your videos and doing past papers, do you recommend doing anything else to enhance the revision or is this okay? Thank btw. :)
Hi Kanishk, essentially you are doing all the right things! Do ask for a teacher to explain the topic if you find the videos and past papers aren't enough... 👍
Find the 3rd common difference and then divide this by 6 to get the coefficient of n^3. Then, use the method I have shown in the video to get the nth term of the quadratic sequence, and add it to the n^3 term you calculated.
Hello, I've just had my paper 2 maths and there was a 5 mark question on sequences that I had no idea about. It was something about having an^2 + bn- 7 and we were given with the first and second term and had to workout what a and b was. Could you pls go through that, it'd be a massive help for the next paper.
Won't be able to do a video on that before Monday Chand but: For the 1st term, set n = 1 that gives a + b - 7 = 1st term For the 2nd term, set n = 2 gives 4a + 2b - 7 = 2nd term Then solve as a simultaneous equation 👍
@@GingerMathematician if the working is a bit messy but still legible i wont lose marks right? I had to do it on the additional page due to cutting my previous answers
When you are figuring out the nth term of a sequence with 3 differences do you always divide the sequence with 6 or does it vary on something? Your Help would be greatly appreciated!
Difference of differences - more information in my course :-) www.udemy.com/course/igcse-0580-maths-paper-2-exam-workshop/?referralCode=14EF4EDB1E2914A6B29F
what if the sequence is 0,1,4,9,16? and we have to find the nth term for this sequence? i know it's the 2nd difference, but when i subtract 0,1,4,9,16 from 1n^2, i get different answers and that too negetive. pls respond as my exams are near. thank you!
Hi Acai you should subtract 1, 4, 9, 16, 25 from 0, 1,4,9,16 giving you -1, -3, -5, -7 where the nth term is -2n +1 so the answer is n^2 - 2n + 1 or (n - 1)^2 😊👍
What if we have a question like this "The formula for the nth term in the sequence 1, 3, 6, 10... is n(n+1)/k, Where k is an integer. Find the value of k." Please let me to know how to solve this question
Hi Omesha, I would solve the quadratic sequence in the wy shown in the video to get 0.5n^2 + 0.5n, then factorise the 0.5 to get n(n+1) / 2, which means that k must be 2 :-)
Thanks for the cool technique to solve for quadratic and cubic sequences. I find it works well if the remainder of n^2 or n^3 are simply constant. If the formula contains further functions of n, it will not work. e.g. for a quadratic formula which goes like 0.5n^2+0.5n or n^3-5n-2. The series given is 1,3,6,10,15,21 and -6,-4,10,42,98,184. In both these examples I can’t work out the formula after n^2 and n^3 because the remainders are not constant numbers. Could you help?? Thanks you so much for great work!
Yo teacher in the sequence 4,7,12,19, 28 can the formula be 1(n)^2+0(n)+3 I used the quadratic formula way can it be correct I used both formula and they both seem well
This video was really helpful. Thank you so much! Can you please do a video on factorization? That would be really helpful!!! Again thx for all the work that you do.
I think a lot of people are taking the same course and having trouble with it. I know a lot of people in my class that also needed help with the same. Complex factorization would be great. Along with the indices simplification if you know what I am talking about. Thank you so much!
hi, was a little confused about 3rd difference, so for 3rd difference do you always divide your 3rd difference by 6? because the questions you did was 6 divided by 6 so i thought maybe you had to divide it by itself and use 1 in all cases
Hi sir a question, I'm taking IGCSE 0980 Maths and not IGCSE 0580... Is there any difference since I was looking at your prediction paper for 0580 but I couldn't find anything for 0980 which made me panick a little.
@@GingerMathematician Thanks a lot, also if you don't mind me asking the IGCSE in one hour topics where you do all sorts of past paper questions, is that enough for us to be able to answer the questions which are possible to come or do you recommend us practice more?
Hello, i have a question as '(1×3), (2×4), (3×5),...' the answer should be n(n+2) for the nth term. but i cant understand it. pls can u explain it to me by text in the comments? thank you very much for the lesson
@@GingerMathematician questions like q9 on 2015 Oct Nov v 41 The total number of 1 cm lines needed to draw both diagram 1 and 2 is 17 The total number of 1 cm lines needed tocdrawall of the firat m diagrams is 2/3 n^3 +an^2 +bn Find value of a and b
Hi.....thank you so much sir......your lectures really help, sir if you help me with the recurring decimals which is pretty complicated topic for me .......... moreover once again I am very grateful to you for making the complex topic easy❤❤.......,.
If you would like to go through other iGCSE Maths topics in depth, check out the All of iGCSE Playlist here :
ua-cam.com/play/PLYNwTLhq9xZbbYnEipbmqFWb4b-NpOkpd.html
Check out my iGCSE Maths Paper 2 Exam Workshop, where I go through the five most crucial topics you need to know in a revision day style format:
www.udemy.com/course/igcse-0580-maths-paper-2-exam-workshop/?referralCode=14EF4EDB1E2914A6B29F
Me : having difficulties with a topic
*searches Ginger mathematician + that topic *
*watches video *
Attempt past question and I don’t fail a single one !
A true blessing you areeee
Most iGCSE topics should now be covered 🙂 👍
@@GingerMathematician yes I am at least 98% ready
Me right now!!!
I've never seen Maths explain better in this life before. This is fantastic, you explain so detail, soft, and calm that I am starting to love Arithmetic, Geometric and so on sequence/series. Thank you massively helping everyone watching your video!!
No problem Johnathan, glad you like my style 😊 And thank you for your question via e-mail 👍
Literally
Watching 2 hours before my maths paper 2. You're a lifesaver and any grade I end up with will 100% be owed to you
I believe in you! Go out there and show them what you know
you make me so happy.
your way of explaining makes it all easy for me to understand, as I was struggling alot with this topic and had no idea how i'd ever be able to learn all about it. thank you so much for providing us with such easy yet defined explanations, you have no idea how much this helps. ♥
Try and keep it easy and to the point Lulus 🙂👍
Watching this on the morning of my paper 2 IGCSE exam (it's in 2 hours)
Words can't express how much I needed this. Thank you so much
Best of luck Tiger 😊👍
@@GingerMathematician Thanks! I just finished it and there was a big sequence question on the paper. This saved my life-
@@tigered How'd you solve it? I ran into a lot of difficulties with it and I wasn't quite sure.
@@PoomiestPoom It's actually more of a re-arranging than a square sequence question. I struggled for a whole 25 minutes on that single question but the key is to list simultaneous equations (I think, I'm not sure...)
@@tigered did u get it right? my maths paper 4 is in a couple hours as well!
This topic has always made me lose marks but this guy has helped me so much 🥰. I recommend my friends watching your videos, you're truly the best teacher I've seen so far. Keep going sir
Will do 🙂👍
thats so much for releasing these vids i have the the exam in like uhhh 4 days and im stressing myself out too much. i might actually pass because of you :)
You are doing it at the same time as me 👊
Glad I could be of help Malik, go and smash those exams 💪
@@GingerMathematician thanks I really appreciate it I will shock the world this Friday
@@Kanishksz yea where are you giving the paper. I'm giving it in England rn
@@madlad25 India 👍 he has got a worldwide audience, I just came back from England couple of months back
This is the first time i understood sequences. Thank you so much, I love your videos . I have my maths paper 22 tomorrow , and I can't tell how helpful this is
Did it go well?
@@GingerMathematician yess it did, first time i got all the sequence questions right. All thanks to you
I got my exam on the 6th of may and if you haven't uploaded this video i wouldn't been able to solve sequences thank you very much
Glad I could help Hussam 🙂!
youre an actual hero please never stop
Do my best 🙂
Man, a week of class on this doesnt make sense, but then 22 minutes does, thanks
I try to be efficient 🙂👍
I literally love your videos so much! I understand the topic so much better all thanks to this video. Could you please make a video like this on indices
Indices right here Clara 😊: ua-cam.com/video/E9xEeT0_zqk/v-deo.html
Amaaaaaazing video I have an exam tmrw I used to suck at this chapter now hopefully I can ace it
Best of luck let me know how it goes 🙂
@GingerMathematician it was actually pretty easy.I used to struggle in the nth term now I don't. thank u so much also I subbed cuz u 100% deserve it
We love and want much more of these videos.
Videos will keep on coming Asare 🙂👍
Thank you every day!! I am in my IGCSE month, and all your videos are tremendously helpful. God Bless!
Glad the videos helped! All the best for P4 tomorrow!
You definitely deserve Millions of subscribers
I would take a fraction of that ;-)
I don't know if you watch jujutsu kaisen, but you're literally the maharoga to my megumi, oh my god. i have mocks in 2 weeks and i've never felt so prepared after watching your videos and following along man. You're the best!
Lol do my best :-)
Thank you!! I didn't understand anything when my teacher explained it. But I answered almost all questions perfectly after you explained it. :)
Nice!!
Today is my exam and you have saved my life 😉
Glad to have helped Nurdin 🙂
@@GingerMathematician can you recommend some videos for paper 4 on Monday
me：everyone stuying at the the last moment when the exam is tomorrow or today！😂
you are a life saver may god always be with you!
Thanks Githmi 😊 Very kind
Thanks so much I was looking all around UA-cam for a good explanation and found your channel,very helpful👌
Thank you Mr. Doe 🙂 glad to have helped!
You are LEGEND in MATH!
😊
Thank you dude, mocks are soon and I'm stressing out abt old topics since I can't remeber anything 👍
Just go through my All of iGCSE Maths Playlist carefully 🙂 👍
Thanks for the great video! I tried looking for your PPT file for this Sequence questions. Would you be so kind to share the file as you usually do for the other types of questions? Thanks again, it's been a great help to me!
Thanks for your support 😊 Now added to the description! 👍
Thank you so much for the video, Mr. Mathematician.
Sorry, I couldn't quite understand what you meant by what you said here, at 19:36, what does doing the numerator separately as an nth term and the denominator separately as an nth term mean?
at 17:35 i dont get it why do you divide 6 by 6. what was the point? what if we dont have 6 and another number should we still divide by 6
Yes, that is the rule. Whenever we have a third difference, the coefficient of n^3 will be (third difference / 6).
@@GingerMathematicianokay thankyou!
i’ve got my math paper 2 igcse tmrw! manifesting an A* for it! although i’m quite certain i will ace the paper!!!!
Your hard work will pay off. Best of luck on your exams!
This was amazing tbh I like your way of explanation can you plz make a video about Rational and Irrational O level
Rational and Irrational Numbers? 🙂
Yes
Sets too plzzz ❤
thank you so much. you have no idea how much i needed this.
Glad I could help Joanna! If you'd like further help on any iGCSE Maths topic, do use the playlist here :-) : ua-cam.com/play/PLYNwTLhq9xZbbYnEipbmqFWb4b-NpOkpd.html
Thank you so much for this video!! Literally saved my grades. Best channel !!
Let me know how the Paper 4 goes Rex 😉
@@GingerMathematician It went well ! Expect for one question. Rest hopefully is correct
Hey! Thanks for the video. But I noticed you haven’t covered this type of sequence right:
3,5,9,17,33
As it doesn’t have either a 1st, 2nd or 3rd difference.
But I’m not sure how to solve it
Thanks
hii there, I'm not sure if its called geometric progression or not but this is how you do it:
so I assumed you found the difference right?
3 - 5 - 9 - 17 - 33 { sequence }
2 - 4 - 8 - 16 { second difference }
2 4 8 { third diff}
if you notice, you can see the SECOND difference are *square numbers* ( square numbers are just 2^1, 2^2, 2^3 and so on )
so then your 'n' will be the placed as the power of the base number 2
= 2^n
after this you can subtract the difference between the sequence and square number and BEHOLDDD you find a difference of 1!
soooo your sequence will be
2^n + 1
I hope this helps!!
Thank you Mainam 😊😊
@@GingerMathematician no worries :D
@@didyouforgetalready very helpful thank uuu
Sir at 13:48 , for the b part, you said we have to see whether n is an whole number, so if we get n as 0, will it still be no or yes? Please answer fast, I have my test in 4 hours
how did your test go
you are a literal life savor
Thank you 😊👍
Hello, I used your videos this year to read for my math Igcse and I got an A* . Thank you so much I am currently in my first year university studying medicine ! Just remembered you and wanted to tell you how much you have really helped me .
I'm so glad to hear that my videos helped you achieve such great results! Congratulations on your A* and good luck with your studies in medicine!
words cannot explain how helpful this is 🥹🥹🥹 i struggled so much with sequences in year 9 but after watching this im alot more confident ahh hope my test goes well tomorrow!!!thank youu
Glad I could help 😊 Best of luck tomorrow 👍
love you man
Thanks Aiden 🙂👍
Help! Tomorrow I have the IGCSE of math and I don’t understand this exercise.
Nth term of the sequence 4,10,18,28
I do it like you do it, the second difference is 2. Then as you do in the video, I subtract the original sequence with the 1n^2 and it gives different numbers. Not a consist one, it gives me 3,6,9,12 what should I do???
That is the perfect method to find the nth term of a quadratic sequence. After obtaining 3,6,9,12… you would simply find the nth term of this new sequence (3n) and add it to the initial n^2. You would then get the nth term for the initial sequence to be n^2+3n, which is exactly what the question gives us 👍
@@GingerMathematician THANKS!!!! I have the exam in one hour, Thank you so much
Just in summary, (i am little confused here, i would be great if you could help me out with this) at time 2:39 you mentioned that for quadratic equation, divide the difference by 2 and at time 17:21 you said that for cubic equation, difference should be divided by 6. That means, whatever the difference is , ex. 4 as second difference i would still divide it by 2 and if 4 is my third difference, i would still divide it by 6, right?
Thank you.
Exactly Anya - cubics don't come up that often but if they do, take the 3rd difference and divide by 6 🙂👍
Thank you soo much 🤩
i saw a question saying:
1, -2, -3, 4, -5
and it was to find the equation to find nth term, how would we got about approaching this.
Where did you see the question :-)
At 17:29 - why 6/6 for the difference ?
For any cubic, you need to divide by 6 :-)
god bless u , my paper two is in 8hrs and i didnt know sequences until rn AHAH ty!
No problem Zaheda 😊
Sir in 2:45 you said if quadratic we divide by 2 , so what if it is cubic or more,, for example n^4 then ?
Cubic divide by 6 😊👍
Thank you for the response, one more thing.. can it be more than cubic, what I mean is 4th or 5th difference in sequences?
@@faryhanoor4114 not on iGCSE 👍
One more thing I wanted to ask... in quadratic sequence I did a qn in which I got the 2nd difference as 3 so I did 3/2 n^2 for the first 4 terms and then subtracted it from the original sequence. However, the answer that I got after subtracting wasn't the same. ForExample in 4:02 you got the subtracted answer as 3 for each but I got different.... That's where I get confused, kindly let me know what to do for those types of qns... and thank you for your previous reply sir! Glad to have a teacher like you!
@@GingerMathematician kindly reply
I’ve never felt so confident with nth term, thank you 🥲
No problem Yara 🙂 👍
Q20) Find the nth term of the sequence -1, 0, 7, 26, 63, ... How to solve this part? This question is from 0580/Feb/March 2023 paper 22
HINT: It's a cubic sequence...
@@GingerMathematiciandoesn’t make sense though? Once you compare the sequence to the cube numbers, subtracting one from another gives different values: -2, -8, -20, -38, -62. So what’s next?
17:21 is it always the difference divided by 6 if its cubed?
Yes 😊
great video, does this apple for edexcel questions btw?
There is a lot of crossover with Cambridge but this video is more useful 🙂 ua-cam.com/video/Wikkld4k56g/v-deo.htmlsi=KMe2MOSLH-CZcZ3i
@@GingerMathematician will watch
thank you so much you have helped me understand really hard topics
Happy to help :-)
thank you so much for teaching sequence of IG papers
No problem 👍
i love ur video and i clearly undertand ur video how u explain well . thank u so much for helping me and keep it up
Will do 🙂
So if it’s quadratic, I always divide by 2 if it’s cubic I always divide by 6 right?
Exactly 🙂👍
Could you help me with this question: Find the next three terms in this sequence, 0.5, 2, 3, 5, 6.5,
Look at how the difference changes :-)
Great technique in solving quadratic and cubic sequence. Will apply in my classes 😉
Thanks Alvin 🙂 Do my best to keep it simple 👍
Amazing I used to find this topic so difficult I have my exam tmrw it made it so much easier thank you soooooo much 😊
Best of luck for tomorrow Alvira - is this your last mock? 👍
@@GingerMathematician no I have my unit test I have mocks in December
And I have kept a schedule to watch ur circle theorems video and vacation and proportion also
Ah ok 😉
He can u pls do vid on simultaneous equations and if I score good it's totally gonna be ur initiative
1, 2, 4, 7, 11, 16, 22, 29 ........ what would be it nth term , sir please reply
difference is increasing by 1
????
0.5n^2-0.5n+1
@@GingerMathematician thankyou , need a quick revision video before exams in which almost all concepts are slightly touched
, exams are due in 19 days
Keep up with the great work😊
Will do Diego 🙂 👍
Thank you so much!! I was struggling with sequences
No problem Salma 🙂 👍
14:58 over here what about the negative values of n cuz the -n into a negative value of n is -1
When working with sequences, we only consider values of n greater than or equal to 1, with n=1 being the first term.
For the nth term that’s involved with the second and third difference do we always divide by the number it’s self before writing down the square numbers or cube numbers and find the difference?
Divide by 2 for quadratic, divide by 6 for cubic 👍
Nice! I have my igcse in this may series so like a week or so to go. I've just been binge watching your videos and doing past papers, do you recommend doing anything else to enhance the revision or is this okay?
Thank btw. :)
Hi Kanishk, essentially you are doing all the right things! Do ask for a teacher to explain the topic if you find the videos and past papers aren't enough... 👍
@@GingerMathematician just a quick question, are matrix going to be in the syllabus this time around?
Matrices were taken out of the syllabus 👍
Hi!!! Sir i wasnt able to solve the sequence 1,3,6,10,15 using the method you gave for the second difference, i dont know what im doing wrong..
Should be 0.5n^2+0.5n 👍
@@GingerMathematician yess but how can i do it with that method?
@GingerMathematician how would the method for a cubic equation work on this question : find the nth term of the sequence -1, 0, 7, 26, 63?
Find the 3rd common difference and then divide this by 6 to get the coefficient of n^3. Then, use the method I have shown in the video to get the nth term of the quadratic sequence, and add it to the n^3 term you calculated.
Hello, I've just had my paper 2 maths and there was a 5 mark question on sequences that I had no idea about. It was something about having an^2 + bn- 7 and we were given with the first and second term and had to workout what a and b was. Could you pls go through that, it'd be a massive help for the next paper.
Won't be able to do a video on that before Monday Chand but:
For the 1st term, set n = 1 that gives a + b - 7 = 1st term
For the 2nd term, set n = 2 gives
4a + 2b - 7 = 2nd term
Then solve as a simultaneous equation 👍
@@GingerMathematician oh okayy thankyou!! I didn't think of that in the paper!! 😔
@@ChandKhan-zu6uf same it was hard
@@GingerMathematician if the working is a bit messy but still legible i wont lose marks right? I had to do it on the additional page due to cutting my previous answers
Actually it was a repeative question like I have seen it in before in past papers . We could solve it by using simultaneous equation too.
Thanks so much. Really good explanation
Thank you!
When you are figuring out the nth term of a sequence with 3 differences do you always divide the sequence with 6 or does it vary on something? Your Help would be greatly appreciated!
Nope with a third difference, always divide by 6 😊👍
@@GingerMathematician Thank You
Thank you for the video it really helped a lot ❤, but I have a question in the equation ar^n-1. If it was division should the ratio be negative?
Hi Aim King, if it's division then the ratio would be a fraction, i.e dividing by 2 would mean r = 0.5 😊👍
@@GingerMathematician oh ok thanks❤
Thanks for posting this. Means a lot.
No problemo 🙂 👍
Can i use the Casio fx-991ARX calculator for igcse
Yes you can
15, 19, 25, 33 how to find the formula for this????
Difference of differences - more information in my course :-) www.udemy.com/course/igcse-0580-maths-paper-2-exam-workshop/?referralCode=14EF4EDB1E2914A6B29F
Life saver!
No problem Azan 😊
what if the sequence is 0,1,4,9,16? and we have to find the nth term for this sequence? i know it's the 2nd difference, but when i subtract 0,1,4,9,16 from 1n^2, i get different answers and that too negetive. pls respond as my exams are near. thank you!
Hi Acai you should subtract 1, 4, 9, 16, 25 from 0, 1,4,9,16 giving you -1, -3, -5, -7 where the nth term is -2n +1 so the answer is n^2 - 2n + 1 or (n - 1)^2 😊👍
@@GingerMathematician thank you !!
What if we have a question like this
"The formula for the nth term in the sequence 1, 3, 6, 10... is n(n+1)/k,
Where k is an integer.
Find the value of k."
Please let me to know how to solve this question
Hi Omesha, I would solve the quadratic sequence in the wy shown in the video to get 0.5n^2 + 0.5n, then factorise the 0.5 to get n(n+1) / 2, which means that k must be 2 :-)
@@GingerMathematician thank you so much❤️
Thanks for the cool technique to solve for quadratic and cubic sequences. I find it works well if the remainder of n^2 or n^3 are simply constant. If the formula contains further functions of n, it will not work. e.g. for a quadratic formula which goes like 0.5n^2+0.5n or n^3-5n-2. The series given is 1,3,6,10,15,21 and -6,-4,10,42,98,184. In both these examples I can’t work out the formula after n^2 and n^3 because the remainders are not constant numbers. Could you help??
Thanks you so much for great work!
Then for a n^2 sequence, the sequence left over will be linear so you can find the linear nth term normally and add the two nth terms together 🙂👍
@@GingerMathematician thank you very much! 😀
Could anyone please tell me the nth term of the sequence -
5, 13, 25, 41, 61
Ive tried to solve it but keep getting stuck
Should I make a follow-up on quadratic sequences? :-)
hi yes pls it really hard , and u explain it really well @@GingerMathematician
Yo teacher in the sequence 4,7,12,19, 28 can the formula be 1(n)^2+0(n)+3 I used the quadratic formula way can it be correct I used both formula and they both seem well
You can just use ax^2 + bx + c and that will work, it will take a little longer 🙂👍
hello, thank you for this video, i have a question should i practice all variants or just the one ive registered for which is paper 22 and papern42
Prioritise the 22 42 variants for sure, then expand out to 21 41 and 23 63 afterwards 🙂👍
Ilysm ginger man
😊
This video was really helpful. Thank you so much! Can you please do a video on factorization? That would be really helpful!!! Again thx for all the work that you do.
Hi Saketh, thanks for the support 🙂👍 Are you looking for an All of iGCSE Factorising style video?
@@GingerMathematician 0580 would be great mainly
I think a lot of people are taking the same course and having trouble with it. I know a lot of people in my class that also needed help with the same. Complex factorization would be great. Along with the indices simplification if you know what I am talking about. Thank you so much!
I just encountered sequence question where this method was not working the end sequence was n^2+5n
It works in a similar way, the sequence you are left with is the linear sequence 5n :-)
hi, was a little confused about 3rd difference, so for 3rd difference do you always divide your 3rd difference by 6?
because the questions you did was 6 divided by 6 so i thought maybe you had to divide it by itself and use 1 in all cases
3rd differences (cubics) do not come up often, but yes always divide by 6 👍 (and 2nd difference quadratics divide by 2) 🙂
igcse math paper 22 in four hours, thank you for everything 🫶
No problem Trish 👍
Hi sir a question, I'm taking IGCSE 0980 Maths and not IGCSE 0580... Is there any difference since I was looking at your prediction paper for 0580 but I couldn't find anything for 0980 which made me panick a little.
Hi there, no difference at all between 0580 and 0980 aside from the grading used (9 - 1 vs A* - G) 🙂👍
@@GingerMathematician Thanks a lot, also if you don't mind me asking the IGCSE in one hour topics where you do all sorts of past paper questions, is that enough for us to be able to answer the questions which are possible to come or do you recommend us practice more?
Hey! Do you always divide by 2 when its the second difference?
Yup every time 👍
How to find nth term for this sequence
-1, 0, 7, 26, 63, ...
Please help me ginger mathematician
(n-2)^3?
The answer is (n-1)^3-1 but don't know how to solve it
Hello, i have a question as '(1×3), (2×4), (3×5),...' the answer should be n(n+2) for the nth term. but i cant understand it. pls can u explain it to me by text in the comments? thank you very much for the lesson
Won't have chance to give a detailed response here Roshini, sorry 👍
@@GingerMathematician yh its ok i actually got it. By the way thanks for the lesson. It helped me alot.
please do a tutorial video on TRANSFORMATIONs
On my list with Stats to add to the All of iGCSE playlist 👍
God bless you 🙏
Do my best 😉
I got a question for cubic when dividing the first sequence do you always use 6 or just divided with the sequence
Always divide by 6 :-)
Thanks so much ❤
No problem Adrianne 😊👍
Sir can you do simultaneous equation questions of number seq
Do you have a specific question in mind? 🙂
@@GingerMathematician questions like q9 on 2015 Oct Nov v 41
The total number of 1 cm lines needed to draw both diagram 1 and 2 is 17
The total number of 1 cm lines needed tocdrawall of the firat m diagrams is 2/3 n^3 +an^2 +bn
Find value of a and b
could you do a video on paper 6? i have my paper 6 exam in 2 weeks
Hi Angeline, check out my Paper 6 playlist, I've done 3 / 4 walkthroughs 🙂: ua-cam.com/play/PLYNwTLhq9xZagalx8-j8jMYGdQraCKutk.html
great video, can you please make one for chapter 10 straight lines
Probably won't have time before Friday 😕 Sorry!
@@GingerMathematician oh, it's okay no rush thank you very much tho
Which grade is this for pS:TYSMMM
Grade 9 / 10
Sir which papers do I do for paper 2 maths(like from which year to which year) I have maths paper 2 day after tom. It will be very big help
Always start with the most recent (March 2022) and work your way backwards 🙂👍
@@GingerMathematician thanks a lot sir
Hi.....thank you so much sir......your lectures really help, sir if you help me with the recurring decimals which is pretty complicated topic for me .......... moreover once again I am very grateful to you for making the complex topic easy❤❤.......,.
I'll add to the list 😊👍
@@GingerMathematician ok sir. Thank you so much!💜
Holy shit. Thank you so much.
Glad it was helpful with a reaction like that 😉
want a video on diffrencation & co ordinate geo please.....tomorrow I have 0580 paper 4 exam
Differentiation already done: ua-cam.com/video/gQ3VRV6f7J8/v-deo.html
may u plz tell me which program u use?
For my videos? 🤔
@@GingerMathematician yes
for math explanations i cant find a program with a tracing paper
please help
Thank you
No problem Anson 😊
How is this for year 11 I'm year 8 and I took this lesson in school
You'll be ready for IB Maths Higher Level in due course 😊👍
OMG! I love uu😭❤❤❤
Thank you Hayat :-)