If x, y and z are real numbers such that: x + y + z = 5 and xy + yz + zx = 3, what is the largest value that x can have ?
(In reply to re(3): another solution
Whoops. Not doing so good today. I was looking at a "3-D" graph and misjudged the maximum by eye.
Posted by Charlie
on 2003-11-18 21:28:07