滚屏QT万人房间号1241来找29部温瞳.rtf

文档介绍：x
A
x
C
A
Î
Û
Ï
,
U
x
C
A
x
A
Î
Û
Ï
.

2.
德摩根公式

(
)
;
(
)
U
U
U
U
U
U
C
A
B
C
A
C
B
C
A
B
C
A
C
B
=
=
I
U
U
I
.
3.
包含关系

A
B
A
A
B
B
=
Û
=
I
U
U
U
A
B
C
B
C
A
Û
Í
Û
Í

U
A
C
B
Û
=
F
I
U
C
A
B
R
Û
=
U

4.
容斥原理

(
)
(
)
card
A
B
cardA
cardB
card
A
B
=
+
-
U
I

(
)
(
)
card
A
B
C
cardA
cardB
cardC
card
A
B
=
+
+
-
U
U
I

(
)
(
)
(
)
(
)
card
A
B
card
B
C
card
C
A
card
A
B
C
-
-
-
+
I
I
I
I
I
.
5
.
集合
1
2
{
,
,
,
}
n
a
a
a
L
的子集个数共有
2
n

个;
真子集有
2
n
–
1
个;
非空子集有
2
n

–
113