Prove that if A, B, and C are arbitrary sets and A −C ⊈ A −B, then B ⊈ C. I dont know how to prove this. I want to contrapostive B⊆C, then A-C ⊆ A-B.
Prove that if A, B, and C are arbitrary sets and A −C ⊈ A −B, then B ⊈ C. I dont know how to prove this. I want to contrapostive B⊆C, then A-C ⊆ A-B.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.1: Sets
Problem 39E
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Prove that if A, B, and C are arbitrary sets and A −C ⊈ A −B, then B ⊈ C.
I dont know how to prove this.
I want to contrapostive B⊆C, then A-C ⊆ A-B.
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