Nonlinear Sequences (With Examples)

In this video I discuss how to calculate the n'th term of nonlinear sequences, by introducing the idea of first and second differences. This video corresponds with Chapter 2.6 in the Edexcel GCSE Mathematics textbook.

[@cinnamongrader6608]

Thank you so much! I can’t believe you have so few subscribers! You made this so much easier, before i did not have a clue! I have exams soon so I’m working on doing it as well as I can. You are wonderful!

[@maerufali6262]

thank you so much you helped me pass my gcse

[@user-ii1yj2ok3n]

oh my gosh ur so smart, thank you for teaching me how to do linear and non-linear sequence, I was so confused about it

[@mdashfakuzzamanchy5218]

WOW!!!!!! Just Awesome. Thanks.

[@adultcellolearner4574]

This is really really clear 🙂

[@EgyptandPalestine]

Thanks a lot sir 👏👏👏

[@zewinjose4219]

Thanks 🙌

[@zplymer]

What to do when the second difference isnt equal like 2,5,11,23 have a difference of 3,6,12 and the second different is 3,6

[@khushishah1338]

But is that equal to 2a also?​@junaidashraf7237

[@rufus2.028]

Tack, mannen

[@qayiya7478]

How did you find (a ) on the second difference

[@nguyenmanhja4800]

hi i have a math problem i use your method but it not correct. My sequence are 20, 18 , 15 , 11 ,6 i use your method make a position to term rules -0.5n^2 - n +21.5 and it not correct pls help me out and show me how it can be done

[@halfghost565]

hi, it's actually -0.5n^2 - 0.5n + 21, so i think you might have just miscalculated when comparing -0.5n^2 to Un

[@issahkadiallo2548]

This was relly helpfull, Thank you

[@goku-sangreen4510]

"the 2nd difference equals to 2a" divide the second difference by 2 basically

[@thunsivmeng7893]

What about 0;8;8;16;24

[@hanajabar596]

How do you know its a quadratic sequence?

[@itzme_zeni2521]

Beacuse in quadratic sequence the sequence dosnt go up in the same amount for example 4 , 9 , 16 , 25,36

[@febreze1693]

Bro just did the longer version

[@creeper6831]

What's the shorter method?

[@ireneotugo5674]

Nope. Lost you along the way.

[@MohamedMostafa-mv6yj]

very bad explaining