T T T F 26. For all sets A, if x E q, then x E A. F 27. F 28. For sets A and B, suppose for all x E A it follows that x # B, then A B = q. For sets A and B, if there exist x E A and x # B, then A & B.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter9: Systems Of Linear Equations
Section9.7: Puzzle Problems
Problem 10OE
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T
T
T
F
F 27.
F
28.
26. For all sets A, if x E q, then x E A.
For sets A and B, suppose for all x E A it follows that x # B, then A B = q.
For sets A and B, there exist x EA and x & B, then A ¢ B.
Transcribed Image Text:T T T F F 27. F 28. 26. For all sets A, if x E q, then x E A. For sets A and B, suppose for all x E A it follows that x # B, then A B = q. For sets A and B, there exist x EA and x & B, then A ¢ B.
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