Using the predicate symbols shown and the appropriate quantifiers, write each English language statement as a predicate wff. (The domain is the whole world.) D(x): x is a day S(x): x is sunny R(x): x is rainy M: Monday T: Tuesday All days are sunny.  which of these answers are right? a. (∀x)[D(x) ∧ S(x)] b. (∀x)[D(x) → S(x)] c. (∃x)[D(x) ∧ S(x)] d. (∃x)[D(x) → S(x)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Using the predicate symbols shown and the appropriate quantifiers, write each English language statement as a predicate wff. (The domain is the whole world.)

  • D(x): x is a day
  • S(x): x is sunny
  • R(x): x is rainy
  • M: Monday
  • T: Tuesday

All days are sunny

which of these answers are right?

a. (∀x)[D(x) ∧ S(x)]

b. (∀x)[D(x) → S(x)]

c. (∃x)[D(x) ∧ S(x)]

d. (∃x)[D(x) → S(x)

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