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Answer on Abstract Algebra Question for jas hazari

Question #23825
course: abstract math
book: mathematical proofs: a transition to advanced mathematics 3rd edition

Question: For the sets A={1,2,...,10} and B={2,4,6,9,12,25}, consider the statements P: A ⊆ B. Q:|A-B|=6.

Determine which of the following statements are true.
(a) P∨Q
(b) P∨(~Q)
(c) P∧Q
(d) (~P)∧Q
(e) (~P)∨(~Q)
Expert's answer
1 is in A but not in B. So, the expression A ⊆ B is false
|A-B| = |{1, 3, 5, 7, 8, 10}| = 6
So, P is false and Q is true.
(a) false ∨ true = true
(b) false ∨ ~(true) = false ∨ false = false
(c) false ∧ true = false
(d) ~(false) ∧ true = true ∧ true = true
(e) ~(false) ∨ ~(true) = true ∨ false = true

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