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Subjects
Mathematics State Board
Class 9
Set Language
De Morgan's Law
10.
Prove the set operation
Exercise condition:
5
m.
Answer variants:
1
21
,
1
19
,
1
18
,
17
1
19
,
1
18
1
22
,
1
21
,
1
20
,
17
,
18
,
19
1
22
,
1
21
,
17
,
19
1
20
,
1
19
,
1
18
,
18
1
22
,
1
20
,
18
,
19
If
U
=
1
22
,
1
21
,
1
20
,
1
19
,
1
18
,
17
,
18
,
19
,
X
=
1
20
,
1
19
,
1
18
,
18
and
Y
=
1
21
,
1
19
,
1
18
,
17
, then prove that
(X \cap Y)^{\prime} = X^{\prime} \cup Y^{\prime}
.
X \cap Y
=
,
(X \cap Y)^{\prime}
=
X^{\prime}
=
,
Y^{\prime}
=
X^{\prime} \cup Y^{\prime}
=
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