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xdrgnh
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Homework Statement
Use Lagrange multipliers to ¯nd the maximum and mini-
mum value(s), if they exist, of
f(x; y; z) = x^2 -2y + 2z^2
subject to the constraint x^2+y^2+z^2
Homework Equations
The Attempt at a Solution
Basically after I find the gradient of the functions I get this.
2x=2x lamda
-2=2y lamda
4z=2z lamda.
One case lamda equals 1 while the other it equals 2. Does this mean that the Lagrange Mult can't be used?