اگر $f\left( x \right)=-2x+4\,\,\,;\,\,\,-2\le x\le 3$ باشد، ضابطه ${{f}^{-1}}\left( x \right)$ کدام است؟
1 )
$\frac{1}{2}x+2\,\,\,\,;\,\,\,\,1\le x\le 5$
2 )
$\frac{1}{2}x-2\,\,\,\,;\,\,\,\,2\le x\le 8$
3 )
$-\frac{1}{2}x+2\,\,\,\,;\,\,\,\,-1\le x\le 4$
$-\frac{1}{2}x+2\,\,\,\,;\,\,\,\,-2\le x\le 8$