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-   -   Maximum value (http://mymathforum.com/algebra/17877-maximum-value.html)

stuart clark March 5th, 2011 07:03 PM

Maximum value
 
If and and . Then

neo March 5th, 2011 09:58 PM

Re: Maximum value
 
Look at the 'integer solutions' section of:

http://www.wolframalpha.com/input/?i=x^2+%2B+y^2+%2B+z^2+%3D+6+and+x%2By%2Bz%3D0

Calculate the value of the expression for each set of solutions
The maximum value is your answer :D

MarkFL March 5th, 2011 10:02 PM

Re: Maximum value
 
So that folks will not have to copy and paste the URL into their browser:

click here

skipjack March 5th, 2011 10:56 PM

The variables are not required to be integers! The expression is to be maximized, not minimized.

The maximum seems to be 6, achieved when x, y and z are the zeros of r - 3r + 1.

stuart clark March 11th, 2011 07:08 PM

Re: Maximum value
 
skipjack you are saying right.

explanation plz.

thanks

johnny March 11th, 2011 07:10 PM

Quote:

Originally Posted by stuart clark
skipjack you are saying right.

Always. (Assuming not IMO problems)


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