Question

Qual a função inversa da função f(x)=2.x+7 após a entrada a nova função ,determine o valor de f-1(1)

Answer 1

$\mathtt{y=2x+7}\\\mathtt{2x=y-7}\\\mathtt{x=\dfrac{y-7}{2}}$

$\boxed{\boxed{\mathtt{{f}^{-1}(x)=\dfrac{x-7}{2}}}}$

$\boxed{\boxed{\mathtt{{f}^{-1}(1)=\dfrac{1-7}{2}=-3}}}$