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JEE MATHEMATICS MCQ: FUNCTIONS

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Application +4 | -1

Let

f(x)=\frac{x-1}{x+1}

, then

f\{f(x)\}

is

View answer and explanation

Correct option: B

-\frac{1}{x}

Option B (

- \frac{{1}}{{x}}

) is correct because when you compute

f\{f(x)\}

with

f(x) = \frac{{x-1}}{{x+1}}

, the result simplifies to

-\frac{{1}}{{x}}

.

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