Question

Find g[f(5)] if f(x) = x + 1 and g(x) = 3x - 2

Answer 1

First step:

Calculate f(5). Put x = 5 to the equation f(x) = x + 1:

f(5) = 5 + 1 = 6

Second step:

Calculate g[f(5)] = g(6). Put x = 6 to the equation g(x) = 3x - 2:

g(6) = 3(6) - 2 = 18 - 2 = 16

Answer: g[f(5)] = 16