# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2003 | May-Jun | (P1-9709/01) | Q#1

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**Question**

Find the value of the coefficient of in the expansion of .

**Solution**

First rewrite the given expression in standard form.

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

In the given case:

Hence;

Since we are looking for the value of the coefficient of , i.e. we can equate

Finally substituting in:

Therefore the coefficient of is .

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