Question: a. Write down the first three terms, in ascending powers of x, of the binomial expansion of (1 + px) 15 , where p is

a. Write down the first three terms, in ascending powers of x, of the binomial expansion of (1 + px)15, where p is a non-zero constant.

b. Given that, in the expansion of (1 + px)15, the coefficient of x is (−q) and the coefficient of x2 is 5q, find the value of p and the value of q.

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