%% auteur : Mora

-0.4 1.3 setxrange
-0.2 1.2 setyrange
300 setxunit
300 setyunit
/quadrillagewidth[.7 .4 .1] def
[0.2 0.2 1 1 1 1]{.7 setgray} Quadrillage
.7 setlinewidth
%1 1 setsubtkstep
traceaxes
axesarrow
1 xticks
1 yticks
marks

/f{setxvar
x 2 exp
} def
0 1.5 {f} Courbe
0.9 xtick
/g{setxvar
x
} def
0 1.5 {g}  Courbe

/A1{0.9 0.81} def
/A2{0.81 0.81} def
/A3{0.81 0.6561} def
/A4{0.6561 0.6561} def
/A5{0.6561 0.43047} def
/A6{0.43047 0.43047} def
/A7{A1 projx} def
/A8{A3 projx} def
/A9{A5 projx} def
/A10{A6 projx} def
/A11{A2 projy} def
/A12{A4 projy} def
/A13{A6 projy} def
pointilles
rouge
[A1 A2] ligne
[A2 A3] ligne
[A3 A4] ligne
[A4 A5] ligne
[A5 A6] ligne
noir
[A1 A7] ligne
[A3 A8] ligne
[A5 A9] ligne
[A6 A10] ligne
[A2 A11] ligne
[A4 A12] ligne
[A6 A13] ligne
<tex>
$C_f $
</tex>
1.05 1.1 [2 dup] ultexlabel
<tex>
$u_0 $
</tex>
0.95 0 [1.5 dup] dltexlabel


<tex>
$y=x$
</tex>
1.25 1 [2 dup] ultexlabel

<tex>
$u_1$
</tex>
0.84 0 [1.5 dup] dltexlabel
<tex>
$u_2$
</tex>
0.69 0 [1.5 dup] dltexlabel

<tex>
$u_3$
</tex>
0.46 0 [1.5 dup] dltexlabel

<tex>
$u_1= f(u_0)$
</tex>
0 0.9 [1.5 dup] dltexlabel

<tex>
$u_2= f(u_1)$
</tex>
0 0.71 [1.5 dup] dltexlabel
<tex>
$u_3= f(u_2)$
</tex>
0 0.46 [1.5 dup] dltexlabel
%% adresse IP : 89.227.41.10