CSCI 250 Spring 2013
Discrete Structures
Archived Class
Charles Cusack
Computer Science
Hope College
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Homework 5

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SectionProblemNotes
2.130Prove your conclusion.
36
2.212Use a "set containment proof". See Examples 10 and 12. Your proof should contain phrases like "Let x∈FOO", "by the definition of union", "thus FOO⊆FERZLE", etc.
16aSee note for the previous problem.
52
58This is asking two separate questions—one about unions and the other about intersections. It is not asking about doing both at the same time since it is unclear what that would even mean.