Unformatted text preview: * a = b has a unique solution y ∈ G . Exercise 67. If ( G, * ) is a group, and a,b,c ∈ G , is it always true that a * b = c * a implies b = c ? Be sure to justify your response. Exercise 68. Is ( Z ,-) a group?...
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- Fall '09
- Math, Following, Prime number, unique solution