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Topic: proof of an inequality
Replies: 12   Last Post: Apr 24, 2013 9:02 AM

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 Paul Posts: 780 Registered: 7/12/10
Re: proof of an inequality
Posted: Apr 23, 2013 10:55 AM

On Tuesday, April 23, 2013 3:28:44 PM UTC+1, oercim wrote:
> Sorry, you are right, so let modify:
>
>
>
> x1^2+x2^2+....+xn^2>=ave(x)^2
>
>
>
> does this inequality always hold? Thanks a lot.

Ok, I solved it. Just giving the answer won't help much.
Try looking at related problems that are simpler.
For example, what happens if n is small such as 1, 2 or 3?
What happens if you replace squaring by an even simpler function?

Paul

Date Subject Author
4/23/13 oercim@yahoo.com
4/23/13 Paul
4/23/13 oercim@yahoo.com
4/23/13 Paul
4/23/13 oercim@yahoo.com
4/23/13 oercim@yahoo.com
4/23/13 Paul
4/23/13 Ken.Pledger@vuw.ac.nz
4/23/13 Virgil
4/24/13 Paul
4/24/13 Leon Aigret
4/24/13 Paul
4/24/13 Paul