Dene J: QQR by the rule J(r,s) =r +2s for all (r,s) QQ. a.
Chapter 7, Problem 7.90(choose chapter or problem)
Dene J: QQR by the rule J(r,s) =r +2s for all (r,s) QQ. a. Is J one-to-one? Prove or give a counterexample. b. Is J onto? Prove or give a counterexample.
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