Question

Considere f(x)= x+3 e g(x)= 3x+4. O valor de f(g(2)) é:

Answer 1

f(x) = x + 3
g(x) = 3x + 4

f(g(2)) = f(3 x 2 + 4) = f(6 + 4) = f(10)

f(10) = 10 + 3
f(10) = 13

Portanto, 
f(g(2)) = 13