X
2
X
3
X
6
X
7
X
8
X
9
X
10
X
11
X
12
X
13
X
14
X
15
X
16
X
17
X
X
f(x)
=
x
3
+
x
2
+
x
+
f ' (x)
=
x
2
+
x
+
f '' (x)
=
x
+
f ''' (x)
=
x
1
≅
x
2
≅
x
3
≅
x
1
=
x
2
=
x
1
=
x
y
déf
incrémentation
0
0
0