If A, B, C, and D are sets with A B and C D, and if A and C are disjoint BUD. and B and D are disjoint, then AUC

Advanced Engineering Mathematics
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Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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9.1.7 Prove the following proposition:
(b) If A, B, C, and D are sets with A B and C D, and if A and C are disjoint
and B and D are disjoint, then AUC BUD.
Transcribed Image Text:9.1.7 Prove the following proposition: (b) If A, B, C, and D are sets with A B and C D, and if A and C are disjoint and B and D are disjoint, then AUC BUD.
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