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The integrating factor of the differen...

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

A

`tan^(-1)x`

B

`1+x^(2)`

C

`e^(tan^(-1)x)`

D

`log_(e ) (1+x^(2))`

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