25 setxunit
7.5 setborder
90 setangle_repere
-.5 5.5 setxrange
-4 2 setyrange
[1 1 .5 .5 .1 .1] {orange} Quadrillage
1 1 settkstep
.5 .5 setsubtkstep
1 1 setmkstep
marks
traceaxes
axesarrow
unites
/f {setxvar
#rpn# ln x
} def
/g {setxvar
#rpn# 1/x
} def
gsave
bleu
.75 setlinewidth
continu
{f} courbe
grestore
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