WOLFRAM
|
DEMONSTRATIONS PROJECT
D
e
r
i
v
a
t
i
v
e
o
f
l
o
g
(
x
!
)
x
m
a
x
1
5
.
T
h
i
s
s
i
m
p
l
e
D
e
m
o
n
s
t
r
a
t
i
o
n
i
l
l
u
s
t
r
a
t
e
s
t
h
e
i
m
p
o
r
t
a
n
t
l
i
m
i
t
d
l
o
g
(
x
!
)
d
x
-
l
o
g
(
x
)
→
0
a
s
x
→
∞
.
F
o
r
n
o
n
i
n
t
e
g
e
r
v
a
l
u
e
s
o
f
x
,
w
e
t
a
k
e
x
!
t
o
b
e
Γ
(
x
+
1
)
.
