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⎧
⎛
3
c
⎞
0
a
≤
x
≤
b
−
c
−
m
−
1
;
⎜
⎝
⎟
⎠
⎪
m
2
⎪
⎛
c
⎞
⎪
m
−
1
⎜
b
−
c
−
−
x
⎟
3
c
c
⎪
m
⎛
⎞
⎛
⎞
2
⎜
⎟
R
,
b
−
c
−
m
−
1
<
x
≤
b
−
c
−
m
−
1
;
⎜
⎝
⎟
⎠
⎜
⎝
⎟
⎠
⎪
m
m
⎜
⎜
c
⎟
⎟
2
2
⎪
⎪
m
−
1
⎝
⎠
()
μ
x
=
⎨
m
−
1
⎛
c
⎞
⎪
m
−
1
x
−
b
+
c
+
⎜
⎟
c
c
⎛
⎞
⎛
⎞
m
⎪
2
⎜
⎟
L
,
b
−
c
−
m
−
1
<
x
≤
b
−
c
+
m
−
1
;
⎜
⎝
⎟
⎠
⎜
⎝
⎟
⎠
⎪
m
m
c
2
2
⎜
⎜
⎟
⎟
m
−
1
⎪
⎝
⎠
⎪
c
⎛
⎞
⎪
0
b
−
c
+
m
−
1
<
x
≤
b
.
⎜
⎝
⎟
⎠
⎪
m
2
⎩
()
()
μ
x
μ
x
Similarly to
membership functions
,
for term
X
are
l
=
2
m
−
2
m
1
−
l
constructed.
With even number of terms:
c
≤
c
1.
If
, then
1
2
c
⎧
1
a
≤
x
≤
1
;
⎪
2
⎪
c
⎛
⎞
⎪
⎪
1
⎜
x
−
⎟
c
3
c
2
()
⎜
⎟
μ
x
=
L
,
1
<
x
≤
1
;
⎨
1
c
2
2
⎜
⎜
⎟
⎟
⎪
1
⎪
⎝
⎠
⎪
3
c
0
1
<
x
≤
b
.
⎪
⎩
2
c
>
c
2.
If
, then
1
2
⎧
c
⎛
⎞
1
a
≤
x
≤
c
−
2
;
⎜
⎝
⎟
⎠
⎪
1
2
⎪
c
⎛
⎞
⎪
x
c
2
⎜
−
+
⎟
⎪
c
c
1
⎛
⎞
⎛
⎞
2
()
⎜
⎟
μ
x
=
L
,
c
−
2
<
x
≤
c
+
2
;
⎜
⎝
⎟
⎠
⎜
⎝
⎟
⎠
⎨
1
1
1
⎜
⎜
c
⎟
⎟
2
2
⎪
2
⎪
⎝
⎠
⎪
⎛
c
⎞
2
0
⎜
⎝
c
+
⎟
⎠
<
x
≤
b
.
⎪
1
2
⎩
With odd number of terms:
c
≤
c
1.
If
, then
1
2