binomial expansion a level maths help

I get it now// ignore

(edited 3 years ago)

Write the denominator as
(4+x^2)^(-1/2)
And expand both terms, then multiply to get the cubic coefficient.

Write the denominator as
(4+x^2)^(-1/2)
And expand both terms, then multiply to get the cubic coefficient.

thank you !!

Write the denominator as
(4+x^2)^(-1/2)
And expand both terms, then multiply to get the cubic coefficient.

in the denominator how would you get the coefficient of x^3 because for the fourth term the x value is (x^2 /4 )^3

in the denominator how would you get the coefficient of x^3 because for the fourth term the x value is (x^2 /4 )^3

You'd only get even powers in that expansion, so which terms would end up (multiplied by the other expansion) with a cubic?

What are The Student Room badges?

What’s happening with GCSE, A-level and Btec exams in 2023?

What A-levels do you need to become an engineer?

What A-levels do you need to study maths?