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corey1234
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Ok. I have a very hard question. Hopefully someone here can solve it. Now for binary operations, well I have one here, and I need to know if there exists in R (the set of real numbers), an identity element for the operation *. Here is the operation, x*y=abs(xy). Now when I do it, I break up the absolute value into xe for xe greater than 0 and (xe) for xe less than 0, where e is the identity element. Please explain your steps to this problem.
 one year ago
 one year ago
corey1234 Group Title
Ok. I have a very hard question. Hopefully someone here can solve it. Now for binary operations, well I have one here, and I need to know if there exists in R (the set of real numbers), an identity element for the operation *. Here is the operation, x*y=abs(xy). Now when I do it, I break up the absolute value into xe for xe greater than 0 and (xe) for xe less than 0, where e is the identity element. Please explain your steps to this problem.
 one year ago
 one year ago

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sriram1322 Group TitleBest ResponseYou've already chosen the best response.0
x = 1; y= 1/2
 one year ago

mathmate Group TitleBest ResponseYou've already chosen the best response.0
You are looking for e such that x*e=abs(xe) \( \forall x\). Since x*y maps to only the positive half of R, there is no such identity element in \( R\). However, e exists in \( R^+ \).
 one year ago
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