% % tkz-euclide (14/01/2011) % % Coding (utf8) Creator (TeX) Producer (pdfeTeX) % Author Alain Matthes \input{tkzfctpreamble.ltx} \begin{document} \begin{tikzpicture}[scale=4] \tkzInit[xmax=3,ymax=2] \tkzAxeXY \tkzGrid(0,0)(3,2) \tkzFct[color = red, domain = 1/3:3]{0.125*(3*x-1)+0.375*(3*x-1)/(x*x)} \tkzFct[color = blue, domain = 1/3:3]{0.125*(3*x-1)} \tkzDrawTangentLine[with=a, color=blue](1) \tkzText[draw, color= red, fill=brown!50](1,1.5)% {$f(x)=\frac{1}{8}(3x-1)+\frac{3}{8}\left(\frac{3x-1}{x^2}\right)$} \tkzText[draw, color= green!50!black, fill=brown!50](2,0.3)% {$g(x)=\frac{1}{8}(3x-1)$} \end{tikzpicture} \end{document}