\documentclass[usenames,dvipsnames]{article}
\usepackage{pgfplots}
Primo blocco di figure
Codice primo blocco di figure
\begin{tikzpicture}
\begin{axis}[
axis x line=center,
axis y line=center,
scale=1,
xmin = -5,
xmax = 5,
ymin = -8,
ymax = 8,
xlabel = {$x$},
ylabel = {$y$},
xtick = \empty,
ytick = \empty,
extra x ticks = {0},
extra x tick label = {$\hspace{-0.6cm}O$},
colormap={yellowgreen}{rgb255(0cm)=(255,165,0); rgb255(1cm)=(138,43,226)}
]
\addplot[very thick, domain=-5:-1.01, samples=100, mesh,point meta=x] {-x^2/(-x-1)};
\addplot[very thick, domain=-0.99:5, samples=100, mesh,point meta=x] {-x^2/(-x-1)};
\addplot[no marks] coordinates {(-3.5,4)} node {\fbox{a}};
\end{axis}
\end{tikzpicture}
\begin{tikzpicture}
\begin{axis}[
axis x line=center,
axis y line=center,
scale=1,
xmin = -5,
xmax = 5,
ymin = -8,
ymax = 8,
xlabel = {$x$},
ylabel = {$y$},
xtick = \empty,
ytick = \empty,
extra x ticks = {0},
extra x tick label = {$\hspace{-0.6cm}O$},
colormap={yellowgreen}{rgb255(0cm)=(255,165,0); rgb255(1cm)=(138,43,226)}
]
\addplot[very thick, domain=-5:0.99, samples=100, mesh,point meta=x] {x^2/(x-1)};
\addplot[very thick, domain=1.01:5, samples=100, mesh,point meta=x] {x^2/(x-1)};
\addplot[no marks] coordinates {(-2.5,4)} node {\fbox{b}};
\end{axis}
\end{tikzpicture}
\begin{tikzpicture}
\begin{axis}[
axis x line=center,
axis y line=center,
scale=1,
xmin = -5,
xmax = 5,
ymin = -8,
ymax = 8,
xlabel = {$x$},
ylabel = {$y$},
xtick = \empty,
ytick = \empty,
extra x ticks = {0},
extra x tick label = {$\hspace{0.6cm}O$},
colormap={yellowgreen}{rgb255(0cm)=(255,165,0); rgb255(1cm)=(138,43,226)}
]
\addplot[very thick, domain=-5:-1.01, samples=100, mesh,point meta=x] {-x^2/(x+1)};
\addplot[very thick, domain=-0.99:5, samples=100, mesh,point meta=x] {-x^2/(x+1)};
\addplot[no marks] coordinates {(2.5,4)} node {\fbox{c}};
\end{axis}
\end{tikzpicture}
\begin{tikzpicture}
\begin{axis}[
axis x line=center,
axis y line=center,
scale=1,
xmin = -5,
xmax = 5,
ymin = -8,
ymax = 8,
xlabel = {$x$},
ylabel = {$\hspace{-0.5cm}y$},
xtick = \empty,
ytick = \empty,
extra x ticks = {0},
extra x tick label = {$\hspace{-0.6cm}O$},
colormap={yellowgreen}{rgb255(0cm)=(255,165,0); rgb255(1cm)=(138,43,226)}
]
\addplot[very thick, domain=-5:0.99, samples=100, mesh,point meta=x] {x^2/abs(x-1)};
\addplot[very thick, domain=1.01:5, samples=100, mesh,point meta=x] {x^2/abs(x-1)};
\addplot[no marks] coordinates {(2.5,-4)} node {\fbox{d}};
\end{axis}
\end{tikzpicture}
\begin{tikzpicture}
\begin{axis}[
axis x line=center,
axis y line=center,
scale=1,
xmin = -5,
xmax = 5,
ymin = -8,
ymax = 8,
xlabel = {$x$},
ylabel = {$y$},
xtick = \empty,
ytick = \empty,
extra x ticks = {0},
extra x tick label = {$\hspace{-0.6cm}O$},
colormap={yellowgreen}{rgb255(0cm)=(255,165,0); rgb255(1cm)=(138,43,226)}
]
\addplot[very thick, domain=-5:-1.01, samples=100, mesh,point meta=x] {x^2/abs(x+1)};
\addplot[very thick, domain=-0.99:5, samples=100, mesh,point meta=x] {x^2/abs(x+1)};
\addplot[no marks] coordinates {(-2.5,-4)} node {\fbox{e}};
\end{axis}
\end{tikzpicture}