Q. 40

# Mark the correct alternative in the following:The range of the function isA. 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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