"\$ 9 . \\quad \$ Solve \$ : \\frac { x - 1 } { x } - \\frac { x + 1 } { x - 1 } < 2 \$"

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Assertion (

A

): Derivative of

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with respect to

{tan}^{- 1} x

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Reason (

R

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with respect to

x

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

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"\\( 9 . \\quad \\) Solve \\( : \\frac { x - 1 } { x } - \\frac { x + 1 } { x - 1 } < 2 \\)"