Question

Given that f(x) = 3x and that g(x) =x−5 find f(g(3))

Answer 1

f(g(3)) = -6

Explanation:

f(g(3)) means that we first plug x = 3 in for x into g(x) and then use that output as an input for f(x).

First, plug 3 in for x in g(x):

g(3) = 3 - 5 = -2

Now, plug -2 in for x in f(x):

f(-2) = 3 * (-2) = -6

Thus, f(g(3)) = -6.

~ an aesthetics lover