Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2016 | May-Jun | (P1-9709/11) | Q#1

Hits: 434

Question

Find the term independent of  in the expansion of .

.

Solution

Expression for the general term in the Binomial expansion of  is:

In the given case:

Hence;

Since we are looking for the coefficient of the term independent of  i.e. , so we can  equate

Hence, substituting ;

Becomes;

Hence coefficient of the term independent of  i.e.  is .

Please follow and like us:
error0

Comments