# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2006 | Oct-Nov | (P1-9709/01) | Q#1

Question Find the coefficient 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 term with , we can equate Finally substituting in: Therefore the coefficient of is .