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Hello Operator (Posted on 2003-10-17) Difficulty: 4 of 5
Consider a binary operation # that is closed under the set of integers (if a and b are integers, then a#b is an integer).

Assume that, for all integers a and b, it is true that (a#b)#a=b.

Prove that a#(b#a)=b.

See The Solution Submitted by DJ    
Rating: 4.2727 (11 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Repeat (simple solution)Gamer2010-08-26 01:01:23
re: freaky solutionBrian Smith2003-10-29 13:12:08
freaky solutionVictor Zapana2003-10-29 10:33:39
re: My solutionBrian Smith2003-10-21 11:05:20
My solutionAshlee2003-10-21 05:32:09
re(8): A simple solutionSilverKnight2003-10-20 12:33:51
re(7): A simple solutionDJ2003-10-20 11:59:28
re(6): A simple solutionSilverKnight2003-10-20 03:48:46
re(5): A simple solutionDJ2003-10-20 02:18:01
re(4): A simple solutionSilverKnight2003-10-20 01:14:35
re(3): A simple solutionSilverKnight2003-10-20 01:05:22
re(3): A simple solutionDJ2003-10-19 22:08:41
re(2): A simple solutionCharlie2003-10-19 13:25:13
re: A simple solutionSilverKnight2003-10-19 13:22:39
SolutionA simple solutionAngela2003-10-19 11:15:50
re: full solutioniggyb3872003-10-17 20:55:06
Solutionanother way to describe itCharlie2003-10-17 15:07:18
Some Thoughtspoint of interestSilverKnight2003-10-17 14:58:38
Solutionfull solutionSilverKnight2003-10-17 14:48:15
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