Art of Problem Solving

Mock AIME 2 2006-2007 Problems/Problem 11: Difference between revisions

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==Solution==
==Solution==
The sums of the squares of the roots is given in the problem; 3.
The roots are x, y, and z, and we add the squares:


<cmath>x^2+y^2+z^2=\boxed{003}</cmath>


 
==See also==
----
 
*[[Mock AIME 2 2006-2007/Problem 10 | Previous Problem]]
*[[Mock AIME 2 2006-2007/Problem 10 | Previous Problem]]
*[[Mock AIME 2 2006-2007/Problem 12 | Next Problem]]
*[[Mock AIME 2 2006-2007/Problem 12 | Next Problem]]
*[[Mock AIME 2 2006-2007]]
*[[Mock AIME 2 2006-2007]]

Revision as of 11:01, 10 February 2008

Problem

Find the sum of the squares of the roots, real or complex, of the system of simultaneous equations

$x+y+z=3,~x^2+y^2+z^2=3,~x^3+y^3+z^3 =3.$

Solution

The roots are x, y, and z, and we add the squares:

\[x^2+y^2+z^2=\boxed{003}\]

See also