I understand Binomial Theorem, but this was an extension question and I can't find the answer.

Quote:

In the expansion of (1+bx)^n , the first three terms are 1-3x+(15/4)x^2. Find b and n.

Could someone please help me? Thanks.

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- May 4th 2012, 01:20 PMmcshineBinomial Theorem
I understand Binomial Theorem, but this was an extension question and I can't find the answer.

Quote:

In the expansion of (1+bx)^n , the first three terms are 1-3x+(15/4)x^2. Find b and n.

Could someone please help me? Thanks.

- May 4th 2012, 01:29 PMMathoManRe: Binomial Theorem
.

So the first three terms are: .

Take it from there... - May 4th 2012, 01:30 PMa tutorRe: Binomial Theorem
Write out the first three terms of the expansion and compare it to 1-3x+15x^2/4.