Prove the following statement. Assume that all sets are subsets of a universal set U. For all sets A and B, if Ac ⊆ B then A ∪ B = U. Hint: Once you have assumed that A and B are any sets with Ac ⊆ B, which of the following must you show to be true in order to deduce the set equality in the conclusion of the given statement? (Select all that apply.) A ∩ B ⊆ U U ⊆ A ∪ B A ∪ B ⊆ U U ⊆ A ∩ B
Prove the following statement. Assume that all sets are subsets of a universal set U. For all sets A and B, if Ac ⊆ B then A ∪ B = U. Hint: Once you have assumed that A and B are any sets with Ac ⊆ B, which of the following must you show to be true in order to deduce the set equality in the conclusion of the given statement? (Select all that apply.) A ∩ B ⊆ U U ⊆ A ∪ B A ∪ B ⊆ U U ⊆ A ∩ B
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Prove the following statement. Assume that all sets are subsets of a universal set U.
For all sets A and B, if
Ac ⊆ B
then
A ∪ B = U.
Hint: Once you have assumed that A and B are any sets with
Ac ⊆ B,
which of the following must you show to be true in order to deduce the set equality in the conclusion of the given statement? (Select all that apply.)A ∩ B ⊆ U
U ⊆ A ∪ B
A ∪ B ⊆ U
U ⊆ A ∩ B
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