Challenge problem:

Show that: ,where a,b,c are any real Nos.

Moderator edit:Approved Challenge question.

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- June 9th 2010, 05:54 AMalexandrosabsolute value
Challenge problem:

Show that: ,where a,b,c are any real Nos.

**Moderator edit:**Approved Challenge question. - June 10th 2010, 01:55 AMUnbeatable0
From it follows that

Let

Thus, we have:

And we're done.

On the last step we used AM-GM inequality to get

- June 10th 2010, 05:35 AMalexandros