25 setxunit
7.5 setborder
90 setangle_repere
-2 10 setxrange
-2 10 setyrange
/quadrillagegray 0.4 def
1 setquadrillagexstep
1 setquadrillageystep
quadrillage
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
unites
/f {setxvar
#rpn# (x-3)^2 + 1
} def
/g {setxvar
#rpn# x
} def
gsave
bleu
.75 setlinewidth
continu
{f} courbe
grestore
gsave
bleu
continu
/hstep 4 store
/hangle 15 store
2 3 {f} Hachcourbe
grestore
2.8 settailletangente
1 {f} tangente
2 {f} tangente
3 {f} tangente
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