# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2011 | Oct-Nov | (P1-9709/13) | Q#1

Hits: 145 Question The coefficient of in the expansion of , is 30. Find the value of . Solution Expression for the Binomial expansion of is: In the given case: Hence; Since the coefficient of in the expansion of , is 30: Please follow and like us: 0