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July 17th, 2013, 11:52 AM  #1 
Senior Member Joined: Aug 2011 Posts: 149 Thanks: 0  Why my solution is different from sample solution?
Hello. When I solved problem I found that my solution is different from one in textbook. I am wondering if I am doing anything wrong or if sample solution is wrong. Task: Prove equality by using definition. My solution. 1)We have to show that 2)Let . Implications are valid\ 3)(provided that so ). By taking ,we get Sample solution 1)We have to show that 2)Let . Implications are valid\ 3)(provided that so ). By taking ,we get Only difference is that sample solition has  where I have + and + where I have . Is there any reason why sample solution should have  instead of + or is it just they're typo? 
July 17th, 2013, 12:28 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,607 Thanks: 616  Re: Why my solution is different from sample solution?
It looks like a typo.


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