Prove ¬¬A := ¬(¬A) = A ¬(A ^ B) = (¬A) V (¬B) ¬(AV B) = (-A) ^ (¬B)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.4: Values Of The Trigonometric Functions
Problem 22E
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Prove
¬¬A := ¬(¬A) = A
¬(A ^ B) = (¬A) V (¬B)
¬(A V B) = (¬A) ^ (¬B)
(Vx € X: E(x)) = (x € X : ¬E(x))
Transcribed Image Text:Prove ¬¬A := ¬(¬A) = A ¬(A ^ B) = (¬A) V (¬B) ¬(A V B) = (¬A) ^ (¬B) (Vx € X: E(x)) = (x € X : ¬E(x))
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