\documentclass[openany,11pt]{book}%برای شروع نشدن از صفحات فرد

\usepackage[usenames,dvipsnames]{pstricks}
 \usepackage{epsfig}
% \usepackage{pst-grad} % For gradients
 \usepackage{pst-plot} % For axes
 \usepackage{tabvar}



\begin{document}
\scalebox{1} % Change this value to rescale the drawing.
{
\begin{pspicture}(0,-0.84875)(6.02,0.84875)
\centering
\psline[linewidth=0.04cm,arrowsize=0.05291667cm 2.0,arrowlength=1.4,arrowinset=0.4]{->}(0.0,0.61875)(6.0,0.61875)
\usefont{T1}{ptm}{m}{it}
\rput(3.8404686,0.32875){$a$}
\psdots[dotsize=0.12](3.6,0.61875)
\usefont{T1}{ptm}{m}{n}
\rput(2.6485937,0.66875){(}
\usefont{T1}{ptm}{m}{n}
\rput(4.6484375,0.66875){)}
\psdots[dotsize=0.12](1.0,0.61875)
\usefont{T1}{ptm}{m}{it}
\rput(4.8304687,0.32875){$a+r$}
\usefont{T1}{ptm}{m}{it}
\rput(2.7704687,0.32875){$a-r$}
\psline[linewidth=0.08cm](2.6,0.61875)(4.7,0.61875)
\usefont{T1}{ptm}{m}{n}
\rput(1.0514063,0.32875){$0$}
\psline[linewidth=0.04cm,arrowsize=0.05291667cm 2.0,arrowlength=1.4,arrowinset=0.4]{->}(0.0,-0.38125)(6.0,-0.38125)
\usefont{T1}{ptm}{m}{it}
\rput(3.8404686,-0.67125){$a$}
\usefont{T1}{ptm}{m}{n}
\rput(2.6485937,-0.33125){(}
\usefont{T1}{ptm}{m}{n}
\rput(4.6484375,-0.33125){)}
\psdots[dotsize=0.12](1.0,-0.38125)
\usefont{T1}{ptm}{m}{it}
\rput(4.8304687,-0.67125){$a+r$}
\usefont{T1}{ptm}{m}{it}
\rput(2.7704687,-0.67125){$a-r$}
\psline[linewidth=0.08cm](2.6,-0.38125)(4.7,-0.38125)
\usefont{T1}{ptm}{m}{n}
\rput(1.0514063,-0.67125){$0$}
\psdots[dotsize=0.14,fillstyle=solid,dotstyle=o](3.6,-0.38125)
\end{pspicture} 
}

\end{document}