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Mathematics
Mathematics
Problem
Let A, B and C be three sets
A
∪
B
=
A
∪
C
A \cup B = A \cup C
A
∪
B
=
A
∪
C
and
A
∩
B
=
A
∩
C
A \cap B = A \cap C
A
∩
B
=
A
∩
C
, show that
B
=
C
B = C
B
=
C
.
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