# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2007 | Oct-Nov | (P1-9709/01) | Q#3

Hits: 49 Question i. Find the first three terms in the expansion of in ascending powers of . ii. Use the substitution in your answer to part (i) to find the coefficient of in the expansion of . Solution i. Expression for the Binomial expansion of is: In the given case: Hence; ii. Substituting in Gives us We are interested […]