題組內容
3.
(b) (8 points) Show that part (a) becomes wrong for a function of two variables by finding all local maxima and minima of the function:
$$ f(x, y) = - (x2 - 1)2 - (x2 y - x - 1)2.
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3.
(b) (8 points) Show that part (a) becomes wrong for a function of two variables by finding all local maxima and minima of the function:
$$ f(x, y) = - (x2 - 1)2 - (x2 y - x - 1)2.