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The integrating factor of the differenti...

The integrating factor of the differential equation `(dy)/(dx)+(3x^(2)tan^(-1)y-x^(2))(1+y^(2))=0` is

A

`e^(x^(2))`

B

`e^(x^(3))`

C

`e^(3x^(2))`

D

`e^(3x^(3))`

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