ضابطهٔ تابع مربوط به نمودار مقابل کدام است؟
1 )
$f(x)=\left\{ \begin{matrix} x+2\,\,\,\,\,\,\,,\,\,\,\,-2\le x\le 0 \\ x-2\,\,\,\,\,\,\,,\,\,\,\,\,\,\,\,0\le x\le 4 \\\end{matrix} \right.$
2 )
$f(x)=\left\{ \begin{matrix} x\,\,\,\,\,\,\,\,\,\,\,,\,\,\,\,\,\,\,\,\,\,\,\,-2\le x\le 0 \\ -x\,\,\,\,\,\,\,\,,\,\,\,\,\,\,\,\,\,\,\,0\le x\le 4\,\,\,\,\, \\\end{matrix} \right.$
$f(x)=\left\{ \begin{matrix} x+2\,\,\,\,\,\,\,\,\,\,\,\,\,,\,\,\,\,\,\,\,\,\,-2\le x\le 0 \\ \frac{-x}{2}+2\,\,\,\,\,\,\,\,\,,\,\,\,\,\,\,\,\,0\le x\le 4\,\,\,\, \\\end{matrix} \right.$
4 )
$f(x)=\left\{ \begin{matrix} x+2\,\,\,\,\,\,\,\,\,\,\,,\,\,\,\,\,\,\,-2\le x\le 0 \\ 2x+2\,\,\,\,\,\,\,\,,\,\,\,\,\,\,\,\,\,0\le x\le 4\,\, \\\end{matrix} \right.$