Question

Dados f(x)=3x-1 e g(x)=2x+4,para quais valores de x temos f(g(x))=-1?

Answer 1

f(x) = 3x - 1
g(x) = 2x + 4

f[g(x)] = - 1
3.(2x + 4) - 1 = - 1
6x + 12 - 1 = - 1
6x + 12 =0
6x = - 12
x = - 12/6
x = - 2