Integrating factor of the equation (x^2+...

Integrating factor of the equation `(x^2+1)"dy"/"dx"+2xy=x^2-1` is

A

(a) `x^2+1`

B

(b) `(2x)/(x^2+1)`

C

(c) `(x^2-1)/(x^2+1)`

D

(d) `(x^2+1)/(x^2-1)`

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The correct Answer is:

A

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