Let f(n) (x) be the nth derivative of f(...

Let `f_(n)` (x) be the nth derivative of f(x), The least value of n so that `f_(n)=f_(n+1)` where `f(x)=x^(2)+e^(x)` is
a)4 b)5 c)2 d)3

A

4

B

5

C

2

D

3

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The correct Answer is:

D

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