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question

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Uchia:
hey guys could you give me the way on how to solve part b) I actually solved it but I didn't like the way it took me some time to think about it could you show me a simple way and thanks

a) Write down the first 4 terms of the binomial expansion, in ascending powers of x

(1 +ax) ^n, n>2

b) Given that, in this expansion, the coefficient of x is 8 and the coefficient of x^2 is 30

find the value of n and a

astarmathsandphysics:
When I get home

Uchia:
no need thanks I understood it

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