Question

If r(x) = 2 – x2 and w(x) = x – 2, what is the range of (Wºr) (x)

Answer 1

A

(-infinity, and 0)

just took test      

Answer 2

Let's first write the expression of the function we need.
$(w \circ r)(x) = w(r(x)) = 2 - x^{2} - 2 = x^{2}$
From here, we can easily conclude that the range is
$[0, +\infty[$