# 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

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**Question**

Find the term independent of in the expansion of .

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**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 7.

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