Question

If f(x) = 2x+1 and g(x)= X2-5, find (gºf)(2)

Answer 1

(gof)(2) = 20

Explanation:

(gof)(2) = g(f(2))

Plug in 2 for f

f(2) = 2(2) + 1 = 4 + 1 = 5

Now that you got 5 as the answer, plug it into g

g(f(2)) = g(5)

`g(5) = x^(2) - 5 = 5^(2) - 5 = 25 - 5 = 20`