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| Homework 7Details| Section | Problem | Notes
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| 1.1 | 22
| | 1.3 | 30 | Begin by realizing that it can only be false if the premise is true but the conclusion is false. Then argue that if the conclusion is false, the premise is, too.
| | 1.4 | 56
| | 1.7 | 18 | Take the assumption that n is an integer as a given, and read the problem as "If 3n+2 is even, then n is even."
| | 1.8 | 6 | Make sure to use the official definitions of odd and even throughout the proof. Also, the phrase about opposite parity simply means that one is odd and the other is even. |
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