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You are not logged in. #1 20131013 02:32:44
Question on associativity.Hey, I just have a question concerning associativity : And I needed to prove each of my steps concerning an exercise. What I found weird was in the correction part, they justify the retreat of parentheses by saying "associativty" I thought that associativity was only used when you needed to add parentheses, or it can go in both ways ? Could anyone confirm it ??? #4 20131013 18:11:27
Re: Question on associativity.hi AlAllo Nehushtan is absolutely right; associativity applies to binary operations; that is to say, two elements combined to make one; so a four element expression doesn't exist. I assume that the questioner intends the four element expression means 'add' elements in pairs in order going left to right hence combine a + b, then the result with c; then that result with d. This is what Nehushtan has written. So how do you do it? treat (a + b) as P; c as Q; d as R Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei 