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If f(x) = int(x^2)^(x^2 + 1) e^(-t^2) dt...

If `f(x) = int_(x^2)^(x^2 + 1) e^(-t^2) dt`, find the interval in which f(x) is increasing :

A

`(0, oo)`

B

`(-oo, 0)`

C

`(-2, 2)`

D

No where

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The correct Answer is:
B
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