Please continue to make videos on maths. I have my mock exams coming up in two weeks and my exams next year and this 9 minute video has taught me more than my teacher does in 1 hour.
7:48 Don't know if this helps others but the penny didn't drop for me straight away. When the number is a constant (ie doesn't go up or down) below the square number sequence (written in green) then that number, in this case -5, slots straight into the answer after the N squared figure. It happens in example 1 too.
The difference between the n^2 sequence and the sequence given in the question is +1, -1, -3, -5 ... (written in blue). The nth term of this sequence is -2n + 3. So the nth term of the sequence is n^2 - 2n + 3 .
If you go to 4 mins 20 seconds in on this video, it is the same concept (and the second example is a simple quadratic sequence) ua-cam.com/video/62Gj0oGfcrM/v-deo.html You are just substituting values for n to get the terms.
Please continue to make videos on maths. I have my mock exams coming up in two weeks and my exams next year and this 9 minute video has taught me more than my teacher does in 1 hour.
7:48 Don't know if this helps others but the penny didn't drop for me straight away. When the number is a constant (ie doesn't go up or down) below the square number sequence (written in green) then that number, in this case -5, slots straight into the answer after the N squared figure. It happens in example 1 too.
Lol Bradley just doing revision XD
On the practice one of the first question why is it +3 and not just n2 - 2?
The difference between the n^2 sequence and the sequence given in the question is +1, -1, -3, -5 ... (written in blue). The nth term of this sequence is -2n + 3. So the nth term of the sequence is n^2 - 2n + 3 .
Cheers. would you be able to do a video on time series?
I will add it to my list (but I have 8 other videos to record first!)
hi do you have a video on finding a quadratic sequence from the nth term
If you go to 4 mins 20 seconds in on this video, it is the same concept (and the second example is a simple quadratic sequence)
ua-cam.com/video/62Gj0oGfcrM/v-deo.html
You are just substituting values for n to get the terms.
@@Bright-Maths thanks