Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2009 | May-Jun | (P1-9709/01) | Q#3
i. Find the first three terms in the expansion of in ascending powers of .
ii. Hence find the value of the constant for which there is no term in in the expansion of .
Expression for the Binomial expansion of is:
In the given case:
To find the value of the constant for which there is no term in in the expansion of
From (i) we have;
Since there is no term in ;