Lagrange
用Lagrange求
find the minimum value of f(x,y)=x^2-y^2 subject to
the constraint x^2+y^2=4
我算過 可是算出來怪怪的= =+....
fx出來的朗打=1
但fy出來的朗打= - 1
有請高手了!!!!謝
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