Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Question
Let the domain be the set of all people. Let:
P(x,y): x knows y.
Which of the following is the correct translation for:
"Someone is known by everyone."
Select the correct option
(a) ∃y∀x P(x,y)
(b) ∃x∀y P(x,y)
(c) ∀y∃x P(x,y)
(d) ∀x∃y P(x,y)
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