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Subjects
Mathematics State Board
Class 9
Set Language
De Morgan's Law
6.
Five mark example problems II
Exercise condition:
5
m.
Answer variants:
Verify
(A \cup B)' = A' \cap B'
using Venn diagrams.
Proof
:
A \cup B =
(A \cup B)' =
---- (
1
)
A' =
B' =
A' \cap B' =
---- (
2
)
From equations (
1
) and (
2
), we have
(A \cup B)' = A' \cap B'
.
Hence, we proved.
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