Question

Para as funçoes reais f(x) = 2x + 1 e g(x) = 3x -4. Obtenha as leis gof e fog.

Answer 1

f(x) = 2x + 1 e g(x) = 3x - 4

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

f(g(x)) = 2(3x - 4) + 1
f(g(x)) = 6x - 8 + 1
f(g(x)) = 6x - 7