Mark the correct alternative in the following: The range of the function is

Question

Philoid · Accepted 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}