Question

Considerando as funções f (x)=4x+m e g (x)=2x-6 determine m para que (fog)=(gof).

Answer 1

kkkk pega 
f(x)=4x +m
g(x)=2x-6
fog=f(g(x))=4(2x-6)+m
fog=8x-24+m
gof=g(f(x))=2(4x+m)-6
gof=8 x - 6 + 2 m
 fog = gof 
8x-24+m=-6+2m
m=-24+6m=-18