Let A, B and C be sets. (a) Suppose that A C B and BC C. Does this mean that A C C? Prove your answer. Hint: to prove that A C C you must prove the implication, “for all x, if x € A then x e C." (b) Suppose that A e B and B e C. Does this mean that A e C? Give an example to prove that this does NOT always happen (and explain why your example works). You should be able to give an example where |A| = |B| = |C| = 2. %3|

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.1: Sets
Problem 10TFE: True or False Label each of the following statements as either true or false. AB=AC implies B=C, for...
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The class I'm taking is computer science discrete structures.I am completely stuck. Please help!

If you can please add an explanation with answer so I can better understand .

I need help with both a and b please.Thank you!

Let A, B and C be sets.
(a) Suppose that A C B and BC C. Does this mean that A C C?
Prove your answer. Hint: to prove that A C C you must prove
the implication, “for all x, if x € A then x e C."
(b) Suppose that A e B and B e C. Does this mean that A € C?
Give an example to prove that this does NOT always happen
(and explain why your example works). You should be able to
give an example where |A| = |B| = |C| = 2.
%3D
Transcribed Image Text:Let A, B and C be sets. (a) Suppose that A C B and BC C. Does this mean that A C C? Prove your answer. Hint: to prove that A C C you must prove the implication, “for all x, if x € A then x e C." (b) Suppose that A e B and B e C. Does this mean that A € C? Give an example to prove that this does NOT always happen (and explain why your example works). You should be able to give an example where |A| = |B| = |C| = 2. %3D
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