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The coefficient of x^5 in the expansion...

The coefficient of `x^5` in the expansion of `(1+x/(1!)+x^2/(2!)+x^3/(3!)+x^4/(4!)+x^5/(5!))^2` is

A

`(2)/(15)`

B

`(4)/(15)`

C

`(1)/(30)`

D

`(2)/(45)`

Text Solution

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The correct Answer is:
B
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