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Homework Statement
There was a question on my exam a few days ago. Using Lagrange to find the max/min on a region. We only had to answer a certain amount of questions and I never got to this one. I'm working on it now though out of curiosity.
R = { (x,y) | x2 + xy + y2 ≤ 3 }
f(x,y) = 4x3 - 3xy2 - 4y3
Homework Equations
F = f + λg
The Attempt at a Solution
So I first thought we should check the interior of the ellipse, so I did and found (0,0,0) was the only critical obtained.
Then I formed my Lagrange equation and took all the required derivatives as usual. Then I formed my system of equations which actually appears unsolvable due to the large mix of variables per equation.
I'm glad I didn't attempt this one as I'm stumped. I figured I might want to try completing the square on the ellipse, but I'm not sure.