Question

Sendo f(x)=3x+1 e g(x)=4x-3, determine as leis que definem fog, gof, fog

Answer 1

Resolução:
fog = f(g(x)) = 3(4x-3) + 1 = 12x - 12 + 1 = 12x - 11
fog = 12x - 11

gof = g(f(x)) = 4(3x + 1) - 3 = 12x + 4 -3 = 12x + 1
gof = 12x + 1

bons estudos: