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if f(x) = x +x^2/1! + x^3/3! +---+ x^n/n...

if `f(x) = x +x^2/1! + x^3/3! +---+ x^n/n! then f(0) + f'(0) + f''(0) + -------f''^---n times (0)` is equal to

A

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

B

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

C

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

D

`(n(n+1)(2n+1))/(6)`

Text Solution

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The correct Answer is:
A
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