perplexus.info :: Just Math : Is It Necessary and Sufficient

Is It Necessary and Sufficient (Posted on 2008-02-27)

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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Subject	Author	Date
re: Puzzle Solution -- minor correction	K Sengupta	2008-02-28 05:05:19
Puzzle Solution -- minor correction	Steve Herman	2008-02-28 01:29:45
Puzzle Solution	K Sengupta	2008-02-27 23:57:58
More thoughts; Solution?	Steve Herman	2008-02-27 23:45:35
Stating the obvious ...	Steve Herman	2008-02-27 11:34:08

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