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March 6th, 2013, 01:51 AM  #1 
Newbie Joined: Mar 2013 Posts: 12 Thanks: 0  Sequence and Series
For positive real numbers a,b,c prove that (a+b)(b+c)(c+a) >= abc

March 6th, 2013, 01:54 AM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond  Re: Sequence and Series
Expand (a + b)(b + c)(c + a).

March 6th, 2013, 02:45 AM  #3  
Math Team Joined: Mar 2012 From: India, West Bengal Posts: 3,871 Thanks: 86 Math Focus: Number Theory  Re: Sequence and Series Quote:
 
March 6th, 2013, 08:22 PM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,927 Thanks: 2205 
How about a topic title that has some bearing on the problem posted?


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