WOLFRAM
|
DEMONSTRATIONS PROJECT
L
o
g
i
s
t
i
c
E
q
u
a
t
i
o
n
x
0
0
.
4
3
1
r
0
.
4
4
s
h
o
w
f
a
m
i
l
y
o
f
c
u
r
v
e
s
P
o
p
u
l
a
t
i
o
n
g
r
o
w
t
h
c
a
n
b
e
m
o
d
e
l
e
d
u
s
i
n
g
t
h
e
l
o
g
i
s
t
i
c
e
q
u
a
t
i
o
n
,
d
x
d
t
=
r
x
(
1
-
x
)
.
