Use C.P. and/or I.P. to prove the following. (A ∙ O) ⊃B B ⊃~O A ⊃O                                     / ∴~A

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.1: Sets
Problem 36E: Prove or disprove that AB=AC implies B=C.
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Use C.P. and/or I.P. to prove the following.

  1. (AO) ⊃B
  2. B ⊃~O
  3. A ⊃O                                     / ∴~A
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