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Q.The value of ∑k=1n(−1)k+1(nk)k\sum_{k=1}^{n} (-1)^{k+1} \binom{n}{k} k is

a
00
b
n⋅2n−1n \cdot 2^{n-1}
c
(−1)nn2n−1(-1)^n n 2^{n-1}
d
nn

Correct Answer: Option C

The correct solution involves applying the fundamental concept to derive the final value step by step...

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