CAT 2018 Functions Question (Medium)

Question

If f x x 1 x-1 , the ratio of x to f y , where y f x is

Optima Learn · Accepted Answer

Understanding Given f x x 1 x-1 and y f x , we need the ratio of x to f y . Analyzing Substituting y x 1 x-1 into f y y 1 y-1 y 1 2x x-1 and y-1 2 x-1 , so f y 2x x-1 2 x-1 x. Therefore x f y x x 1 1. Evaluating the Options a x y does not simplify to a fixed ratio independent of x, unlike the actual

CAT 2018 Functions — Previous Year Question

CAT 2018

Quantitative

Functions

Medium

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