prove that each wff is a valid argument. (∀x)P(x) ^ (∃x)[P(x)]′ → (∃x)Q(x)

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 that each wff is a valid argument.

(∀x)P(x) ^ (∃x)[P(x)]′ (∃x)Q(x)

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As per the question we have to prove that the following wff is a valid argument :

(∀x)P(x) ^ (∃x)[P(x)]′ → (∃x)Q(x)

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