Question

Sean f,g : R→R donde f(x)=x-5 Si (gof)(x) =x.(3x-2) calcular g(2)

Answer 1

Respuesta:

$x-5=2 \Leftrightarrow x=7$

Luego

$(g\circ f)(7)=g(f(7))=g(2)=7(7*3-2)=7(21-2)=7*19=133$