Question

Помогите решить ..................................

Answer 1

$2)\ \ y=\left\{\begin{array}{l}-\dfrac{2}{3}\, x-\dfrac{4}{3}\ ,\ esli\ \ -5\leq x\leq -2\ ,\\x+2\ ,\ esli\ -2<x<3\ ,\\2\ ,\ esli\ x=3\ .\end{array}\right\\\\\\3)\ \ \ y=\left\{\begin{array}{l}-(x-1)^2+5\ ,\ esli\ x\ne 4\\3\ ,\ esli\ x=4\ .\end{array}\right\\\\\\4)\ \ y=\sqrt{x+3}-2$