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If an = ∑(1/nCr) for (n = 0→n) then ∑(r/nCr) for (n = 0→n) equals

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If an = ∑(1/nCr) for (n = 0→n) then ∑(r/nCr) for (n = 0→n) equals

(a) (n - 1)an

(b) nan

(c) 1/2nan

(d) None of the these

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The correct option is (c) 1/2nan

Explanation:

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