I’m working on a mathematics test / quiz prep and need a sample draft to help me learn.
Here are the proof questions I would like to ask:
1. Let and let . Prove that .
Note: assume and are universal sets.
2. Prove or disprove: if is a relation from to , then .
3. Suppose is a relation from to and is a relation from to such that . Prove or disprove: and must both be functions.
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