f
u
n
c
t
i
o
n
o
s
c
i
l
l
a
t
o
r
:
f
(
x
)
=
c
1
+
c
2
s
i
n
(
c
3
2
π
x
)
i
n
t
e
g
r
a
t
i
o
n
r
u
l
e
S
i
m
p
s
o
n
'
s
:
n
d
2
o
r
d
e
r
c
1
0
c
2
1
c
3
-
2
.
2
s
e
g
m
e
n
t
s
3
l
i
m
i
t
s
l
o
w
e
r
,
a
0
u
p
p
e
r
,
b
1