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The integrating factor of the differential equation \(\left(1-x^2\right) \frac{d y}{d x}+x y=a x\), \(-1<x<1\), is…

Q1

The integrating factor of the differential equation \(\left(1-x^2\right) \frac{d y}{d x}+x y=a x\), \(-1<x<1\), is :

a

\(\frac{1}{x^2-1}\)

b

\(\frac{1}{\sqrt{x^2-1}}\)

c

\(\frac{1}{1-\mathrm{x}^2}\)

d

\(\frac{1}{\sqrt{1-\mathrm{x}^2}}\)

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