Q. 40

Mark the correct alternative in the following:

The range of the function is

A. R – {0}

B. R – {-1, 1}

C. {-1, 1}

D. None of these

Answer :

We know that

|x| = -x in (-∞, 0) and |x| = x in [0, ∞)


So, in (-∞, 0)


And in (0, ∞)


As clearly shown above f(x) has only two values 1 and -1


So, range of f(x) = {-1, 1}

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