Question

If f(x) = -2x - 5 and g(x) = x^4 what is (gºf)(-4)

Answer 1

81

Explanation:

(g∘f)(-4) is another way of writing g(f(-4)).

First, find f(-4):

f(-4) = -2(-4) − 5

f(-4) = 3

Now plug into g(x):

g(f(-4)) = g(3)

g(f(-4)) = 3^4

g(f(-4)) = 81