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Algebra & Trigonometry with Analytic Geometry

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter9: Systems Of Equations And Inequalities

Section9.9: Properties Of Determinants

Problem 36E

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Does f(x, y) = yx² – 2x² – y² have any local extrema or saddle
points? If so, identify them; if not, say why not. It may be helpful in this
problem to recall the Hessian of a function f (x, y):
|fex fry|
fay fyyl
(the vertical bars denote a determinant)

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