Question

considerando a função dada y=1-2x

a)Para x=-½, quanto vale y?

Answer 1

Resolução da questão, veja:

$\mathsf{y=1-2x}}~\to~\mathsf{x=\dfrac{-1}{2}}}\\\\\\\\\ \mathsf{y=1-2~\cdot~\bigg(\dfrac{-1}{2}\bigg)}}\\\\\\\\\ \mathsf{y=1-\bigg(\dfrac{-2}{2}\bigg)}}}\\\\\\\\\ \mathsf{y=1-(-1))}}\\\\\\\\ \mathsf{y=1+1}}\\\\\\\\\\ \large\boxed{\boxed{\boxed{\boxed{\boxed{\mathsf{y=2.}}}}}}}}}}}}}}}}}}}}}}}}}$

Ou seja, nas condições dadas para “x” na questão, “y” valerá 2.

Espero que te ajude. '-'