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If`S=Sigma_(n=1)^(oo) (""^(n)C_(0)+""^(n)C_(1)+""^(n)c_(2)+..+""^(n)C_(n))/(""^(n)P_(n))` then S equals

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If`S=Sigma_(n=1)^(oo) (""^(n)C_(0)+""^(n)C_(1)+""^(n)c_(2)+..+""^(n)C_(n))/(""^(n)P_(n))` then S equals
A. 2e
B. `2e-1`
C. `2e+1`
D. none of these
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Correct Answer - d
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