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The coefficients of x^n in (1+x/(1!)+x^2...

The coefficients of `x^n` in `(1+x/(1!)+x^2/(2!)+……+x^n/(n!))^2` is

A

`2^n/(n!)`

B

`2^(n+1)/((n+1)!)`

C

`2^(n+1)/(n!)`

D

`2^n/((n+1)!)`

Text Solution

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The correct Answer is:
A
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