-1.2 9.5 setxrange
-2.2 3.2 setyrange
28.4527 setxunit %% 10 mm
quadrillage
traceaxes
axesarrow

1 xmark
1 ymark
setTimesItalic
(O) O dltext

/f {setxvar
#rpn# (2 + ln (1+x)) / (1+x)
} def

1 setlinewidth
-.9 xmax {f} Courbe

(C) 1.2 dup f urtext