If fx - x - x2 - x3 - x4 - - where - x - 1 then f - 1x -

The correct option is A x1 x f( x ) = x 1+x x= f^ 1 ( x ) #160; 1 f^ 1 ( x ) #160; ∴ f^ 1 ( x ) = x 1 x ...

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Combination

If fx = x -...

Question

If $f (x) = x - x^{2} + x^{3} - x^{4} + . . . . . . . . . . . . . \infty$ where $| x | ⟨ 1$ then $f^{- 1} (x) =$

\frac{x}{1 - x}

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\frac{x}{1 + x}

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\frac{1}{1 - x}

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\frac{1}{1 + x}

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