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JEE MATHEMATICS MCQ: FUNCTIONS

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Application +4 | -1

If

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

, then

f(2 x)

is equal to

View answer and explanation

Correct option: A

\frac{3 f(x)+1}{f(x)+3}

Option A (

\frac{3 f(x)+1}{f(x)+3}

) is correct because substituting f(x) and simplifying results in f(2x).

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