If Ck is the coefficient of in the expansion of (1+x)2005 and if a, d – InterviewSolution

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1.	If Ck is the coefficient of in the expansion of (1+x)2005 and if a, d are real numbers then ∑2005k=0(a+kd).Ck=
Answer» If $C_{k}$ is the coefficient of in the expansion of ${(1 + x)}^{2005}$ and if a, d are real numbers then $\sum_{k = 0}^{2005} (a + k d) . C_{k} =$

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