Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2014 | May-Jun | (P1-9709/11) | Q#3
Find the term independent of in the expansion of .
Expression for the general term in the Binomial expansion of is:
In the given case:
Since we are looking for the coefficient of the term independent of i.e. , so we can equate
Hence, substituting ;
Hence coefficient of the term independent of i.e. is 7.