Question

considerando a função f(x)=3x+7 e g(x)=4x-1, determine a lei que define f°ge alei que define g°f

Answer 1

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

 f(g(x) = f(4x-1) ==> 3(4x-1) + 7 ==> 12x - 3 + 7 ==> 12x + 4

g(f(x))= g(3x+7) ==> 4(3x+7) - 1 ==> 12x + 28 - 1 ==> 12x +27