Question

If f(x) = 5x - 4 and g(x) = x2, what is (gºf)(2)?

Answer 1

Explanation:

• set F function in g function:

gof(x) = (5x-4)2

• simplified:

gof(x) = 10x-8

• put 2 in function

gof(2) = 10(2) - 8 => 20-8 => 12

Answer 2

Explanation:

(g•f)(2) = g(f(2))

Since f(x) = 5x - 4

f(2) = 5(2) - 4 = 10 - 4 = 6

(g•f)(2) = g(f(2))

g(f(2)) = g(6) = (6)^2 = 36