Integrating factor of equation \[({{x}^{2}}+1)\frac{dy}{dx}+2xy={{x}^{2}}-1\] is [UPSEAT 2002]

\[\frac{{{x}^{2}}-1}{{{x}^{2}}+1}\]

Integrating factor of equation \[({{x}^{2}}+1)\frac{dy}{dx}+2xy={{x}^{

1.	Integrating factor of equation \[({{x}^{2}}+1)\frac{dy}{dx}+2xy={{x}^{2}}-1\] is [UPSEAT 2002]
A.	\[{{x}^{2}}+1\]
B.	\[\frac{2x}{{{x}^{2}}+1}\]
C.	\[\frac{{{x}^{2}}-1}{{{x}^{2}}+1}\]
D.	None of these
Answer» B. \[\frac{2x}{{{x}^{2}}+1}\]

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Integrating factor of equation \[({{x}^{2}}+1)\frac{dy}{dx}+2xy={{x}^{2}}-1\] is [UPSEAT 2002]

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