The value of function f (x) =1 +x+ int (...

The value of function `f (x) =1 +x+ int _(1) ^(x) (ln ^(2)t +2 ln t ) dt ` where `f '(x)` vanishes is:

A

`1/e`

B

0

C

`2/e`

D

`1+2/e`

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The correct Answer is:

D

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