Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2011 | May-Jun | (P1-9709/12) | Q#2
i. Find the terms in and in the expansion of .
ii. Given that there is no term in in the expansion of , find the value of the constant .
First rewrite the given expression in standard form.
Expression for the Binomial expansion of is:
In the given case:
Hence the required terms in and are:
For the expansion of
First we know from (i) that
Since there is no term in i.e coefficient of is ZERO.