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Is It Necessary and Sufficient (Posted on 2008-02-27) Difficulty: 2 of 5
Let a,b,c be real numbers. Is a,b,c≥0 the necessary and sufficient condition to show that a3+b3+c3≥3abc? If not, find the condition that is both sufficient and necessary.

See The Solution Submitted by Praneeth    
Rating: 3.5000 (2 votes)

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re: Puzzle Solution -- minor correction Comment 5 of 5 |
(In reply to Puzzle Solution -- minor correction by Steve Herman)


I have incorporated the foregoing correction in my prevous post.
  Posted by K Sengupta on 2008-02-28 05:05:19

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