1. (a) (b) (c) (d) Prove or disprove that, for any universal set U and predicates P and Q, [3r EU, P(x) ^ Q(x)] → [x = U, P(x)) ^ (3x = U, Q(x))] Prove or disprove that, for any universal set U and predicates P and Q, [3r EU, P(x)) ^ (3x U, Q(x))] → [r € U, P(x) ^ Q(x)] Prove or disprove that, for any universal set U and predicate P [3r € U, P(x)] → [Vr € U, P(x)] Prove or disprove that, for any universal set U and predicate P [Vr U, P(x)] → [3r € U, P(x)]

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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1. (a)
(b)
(c)
(d)
Prove or disprove that, for any universal set U and predicates P and Q,
[3x = U, P(x) ^ Q(x)] → [3r EU, P(x)) ^ (3x = U, Q(x))]
Prove or disprove that, for any universal set U and predicates P and Q,
[3r EU, P(x)) ^ (3xU, Q(x))] → [r U, P(x) ^ Q(x)]
Prove or disprove that, for any universal set U and predicate P
[3r € U, P(x)] → [Vr € U, P(x)]
Prove or disprove that, for any universal set U and predicate P
[VxU, P(x)] → [3r € U, P(x)]
Transcribed Image Text:1. (a) (b) (c) (d) Prove or disprove that, for any universal set U and predicates P and Q, [3x = U, P(x) ^ Q(x)] → [3r EU, P(x)) ^ (3x = U, Q(x))] Prove or disprove that, for any universal set U and predicates P and Q, [3r EU, P(x)) ^ (3xU, Q(x))] → [r U, P(x) ^ Q(x)] Prove or disprove that, for any universal set U and predicate P [3r € U, P(x)] → [Vr € U, P(x)] Prove or disprove that, for any universal set U and predicate P [VxU, P(x)] → [3r € U, P(x)]
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