Question

considere as funções f (x)=3x ao quadrado +x-1 e g (x)=2x+5 determine a)f (g (x) g (f (x)

Answer 1

f(g(x)) = 3(2x+5) +x-1 = 6x+15+x-1 = 7x+14
g(f(x)) = 2(3x²+x-1) +5 = 6x²+2x-2+5 = 6x²+2x+3