Pruning sets. Suppose you have a set. If you remove some of the things from the set, will the collection of remaining things always contain fewer items in it than the original set? If so, demonstrate why. If not, illustrate with an example.
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Chapter 3 Solutions
The Heart of Mathematics: An Invitation to Effective Thinking, WileyPLUS NextGen Card with Loose-leaf Set Single Semester: An Invitation to Effective Thinking (Key Curriculum Press)
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