Question

F(x)=2x-3 e f{g(x)}=x,então g(x) é?

Answer 1

 Olá Vitória, boa tarde!

$f(x)=2x-3\\f(g(x))=2\cdot\,g(x)-3\\x=2\cdot\,g(x)-3\\2\cdot\,g(x)=x+3\\\boxed{g(x)=\frac{x}{2}+\frac{3}{2}}$