Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2012 | Oct-Nov | (P1-9709/13) | 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 of : we can equate
Subsequently substituting in:
Since we are interested in the coefficient of ;