کدام مقدار در برد تابع $f(x)=\left\{ \begin{matrix}
3\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x\, \gt 1 \\
x+4\,\,\,\,\,\,\,\,\,\,-1 \lt x \le 1 \\
x+3\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x\le -1 \\
\end{matrix} \right.$ قرار ندارد؟