Question

Dada as funções f(x) = 2x - 1 e g(x) = 3x + 2, pede-se:
a)Calcular f(g(x))
b) f(g(x)) = 0

Answer 1

f(x) = 2x - 1
g(x) = 3x + 2

f[g(x)] = 2(3x + 2) - 1
f [g(x)] = 6x + 4 - 1
f [g(x)] = 6x + 3

b)
f [g(x)] = 0
6x + 3 = 0
6x = - 3
x = - 3 (:3)
        6 (:3) 
x = - 1
       2