1:11:00 I was stuck on this question for ages because I thought that if it says show that, you can't use what they give you, is that not the case for these parametric equation questions?
by multiplying 3 by (t^2 +1)/(t^2+1) (which equals 3 anyway due to brackets cancelling), you give it a common denominator with x and you can make them one fraction, if that makes sense
Hi, Thank you very much for the video. For question 5b, why is the answer not 16 years as does the profit not exceed £65 000 during the 16th year and therefore the first year when the profit exceeds £65000 is in the 16th year?
i made the same mistake, I believe you treat n as if its a integer. So if n > 16.3 then n = 17. The way I think of it is as it wants the YEARLY profit, that is the profit calculated at the start of the year. So it only exceeds 65k on year 17
He didn't multiply both sides by the denominator but instead combined the two terms into a single fraction by making sure they have the same denominator (he j didn't show that step fully)
No need to worry about that. That is a restriction for when the expression is in a fractional form to stop us dividing by zero. Once the denominators have been multiplied through we do not need a restriction anymore. The method is sound 👍
Dear Sir, Thank you for going through this paper. May i ask why in question 9 you have used X=-2/5 and X=1/2 when clearly it is stated in the question you cant equate them as such?
Hi, the question has stated that because when written as fractions you can’t use those x values as it will result in dividing by zero. However when we multiply the denominators away this no long becomes a problem.
Thats because the denominator cant equal 0 normally (sub them in and you get 0 for the denominator) but you’re multiplying them on both sides so it doesn’t matter
@@jefking2158 formula booklet, also we did the first 4 year 13 topics in year 12, and I just learnt random things like product & quotient rule by myself
i also like how youve timestamped each question and labelled it thank you
THE START TO ONE OF THE BEST MATHS CHANNEL!❤❤❤ BOSHHH!
ua-cam.com/video/4iG780qE5M4/v-deo.htmlsi=SyNKK7n-rK8DdDTk
The goat 🐐
Lebron?
1:20:22 i think you forgot to times the 4k^2 and 2k by 3 but i may be tripping
love your work bro keep going
Thanks! I’m glad you found it helpful. Be sure to subscribe, like and share 👍
Thanks sir, this paper seems much easier than other years (thought this was an as paper)
Same haha, I’m hoping we are this lucky this year😭
at q5c 20:55 you need to give your ans to the nearest 1000
brother fair play on question 14. how did you spot that?
Always be on the look for Difference of 2 Squares!
1:11:00 I was stuck on this question for ages because I thought that if it says show that, you can't use what they give you, is that not the case for these parametric equation questions?
at 54:23 couldn't I divide everything by sin2x and then make sin2x=0 and solve for dat its much easier that way imo but would I get marks that way
Yes absolutely this is a valid method. I just have a habit of factorising!
alright calm cause I normally factorise but I always considered this way, but thought it would be mathematically incorrect to do it that way thx
@@MrAstburyMaths for Q5 will it not be 915,000 for nearest thousands or would you still get mark
1:05:13 how do you know the gradient of dH/dx is 2ax + b? and in question 13, why can you write 3(t^2 + 1)/ t^2 +1 ?
by multiplying 3 by (t^2 +1)/(t^2+1) (which equals 3 anyway due to brackets cancelling), you give it a common denominator with x and you can make them one fraction, if that makes sense
could you use substitution for question 11?
love the video, subbed
My question is howw is it that you are able to cover a 2 hour exam paper in less than an hour 30
In 9b) ii, isn't it supposed to be - 2/5
i got that same answer as well, i checked the mark scheme and your right, the answer is '-2/5
Surely you can just put |x| < 2/5
mod(x) < 2/5 is the same as -2/5 < x < 2/5
Hi,
Thank you very much for the video.
For question 5b, why is the answer not 16 years as does the profit not exceed £65 000 during the 16th year and therefore the first year when the profit exceeds £65000 is in the 16th year?
i made the same mistake, I believe you treat n as if its a integer. So if n > 16.3 then n = 17.
The way I think of it is as it wants the YEARLY profit, that is the profit calculated at the start of the year. So it only exceeds 65k on year 17
for question 10, on finding values for x in the 0
180-x if sin
360-x if cos
180+x if tan
on q9 could you explain how to get the range? I don't understand how you solve it
10:14 Surely by multiplying both sides by 2x2 -4x + 5 you eliminate the fraction. ?
He didn't multiply both sides by the denominator but instead combined the two terms into a single fraction by making sure they have the same denominator (he j didn't show that step fully)
Hey Sir, for question 9 the x values you subbed in for the partial fractions are stated not to be solutions at the top of the question
No need to worry about that. That is a restriction for when the expression is in a fractional form to stop us dividing by zero. Once the denominators have been multiplied through we do not need a restriction anymore. The method is sound 👍
Dear Sir,
Thank you for going through this paper.
May i ask why in question 9 you have used X=-2/5 and X=1/2 when clearly it is stated in the question you cant equate them as such?
Hi, the question has stated that because when written as fractions you can’t use those x values as it will result in dividing by zero. However when we multiply the denominators away this no long becomes a problem.
But for question 9 it said in the question x cannot equal 1/2 or -2/5
Thats because the denominator cant equal 0 normally (sub them in and you get 0 for the denominator) but you’re multiplying them on both sides so it doesn’t matter
Are papers normally this hard because as a year 12 I got 80% so I wanna know if that’s like normal difficulty or really easy
Wdym. How can yu even answer a year 2 paper without learning all the year 2 content
@@jefking2158 the formula booklet🙏
@@jefking2158 formula booklet, also we did the first 4 year 13 topics in year 12, and I just learnt random things like product & quotient rule by myself
do you have a pdf form of the paper
on pmt m8
goat fr
time for revision lol
😂😂😂😂
On question 5c you did not answer the question to the nearest £1000
Indeed! Always read the question carefully and then reread again it once you’ve finished it
thanks man super useful, get some sleep tho 😎
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why do you sound like you're being held at gunpoint😂😂
👍🏾👍🏾👍🏾👍🏾
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