Question

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

(-∞,0]
(-∞,2]
[0,∞)
[2,∞)

Answer 1

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[`

Answer 2

A

(-infinity, and 0)

just took test