Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2004 | Oct-Nov | (P1-9709/01) | Q#1
Find the coefficient of in the expansion of
First rewrite the given expression in standard form.
Expression for the general term in the Binomial expansion of is:
In the given case:
Since we are looking for the term with , i.e. we can equate
Finally substituting in:
Therefore the coefficient of is .