This is probably terribly easy for most of you, but I am stuck on a proof, maybe someone could help me! Prove: a,b are R. If a<b, then -b<-a. Would I use the additive inverse here? l
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Originally Posted by jujab This is probably terribly easy for most of you, but I am stuck on a proof, maybe someone could help me! Prove: a,b are R. If a<b, then -b<-a. Would I use the additive inverse here? l I assume you mean the fact that a+ (-a)= 0. Yes, add a+ b to both sides of the inequality.
Originally Posted by HallsofIvy I assume you mean the fact that a+ (-a)= 0. Yes, add a+ b to both sides of the inequality. Do you mean add $\displaystyle -(a+b)$ to both sides of the inequality?
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