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 Hello Operator (Posted on 2003-10-17)
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)

 Subject Author Date Repeat (simple solution) Gamer 2010-08-26 01:01:23 re: freaky solution Brian Smith 2003-10-29 13:12:08 freaky solution Victor Zapana 2003-10-29 10:33:39 re: My solution Brian Smith 2003-10-21 11:05:20 My solution Ashlee 2003-10-21 05:32:09 re(8): A simple solution SilverKnight 2003-10-20 12:33:51 re(7): A simple solution DJ 2003-10-20 11:59:28 re(6): A simple solution SilverKnight 2003-10-20 03:48:46 re(5): A simple solution DJ 2003-10-20 02:18:01 re(4): A simple solution SilverKnight 2003-10-20 01:14:35 re(3): A simple solution SilverKnight 2003-10-20 01:05:22 re(3): A simple solution DJ 2003-10-19 22:08:41 re(2): A simple solution Charlie 2003-10-19 13:25:13 re: A simple solution SilverKnight 2003-10-19 13:22:39 A simple solution Angela 2003-10-19 11:15:50 re: full solution iggyb387 2003-10-17 20:55:06 another way to describe it Charlie 2003-10-17 15:07:18 point of interest SilverKnight 2003-10-17 14:58:38 full solution SilverKnight 2003-10-17 14:48:15

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