IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Math => Topic started by: Uchia on January 20, 2010, 05:21:41 pm

Title: question
Post by: Uchia on January 20, 2010, 05:21:41 pm

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

Title: Re: question
Post by: astarmathsandphysics on January 20, 2010, 06:32:00 pm

When I get home

Title: Re: question
Post by: Uchia on January 20, 2010, 07:49:03 pm

no need thanks I understood it