If f x -1- x -1- x then which of the following is necessarily true-A- f -1 x f x -1B- f -1 x f x -1C- f -1 x - f x -2D- f -1 x - f x

The correct option is B f 1(x) f(x) = 1y=1+x/1 x Using componendo and dividendo x=y 1/y+1. f^ 1(x)f(x)= 1. ...

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Functions

If f x =1+ x ...

Question

If $f (x) = \frac{1 + x}{1 - x}$ then which of the following is necessarily true?

f^-1(x) f(x) = 1

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f^-1(x) f(x) = -1

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f^-1(x) = f(x)

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f^-1(x) - f(x) = 2

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