What is the extreme f(x,y)=(xy)/((x^2-y^2)^2) ?

The extreme f(x,y)=(xy)/((x^2-y^2)^2) is None

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extreme f(x,y)=(xy)/((x^2-y^2)^2)

extreme points

f (x, y) = \frac{x y}{( x ^{2} - y ^{2} ) ^{2}}

None

Solution steps

Find the critical points:

None

\frac{x y}{( x ^{2} - y ^{2} ) ^{2}}

has no critical points, therefore there are no extreme points

None

f (x) = 2 x^{5} - 6 x^{4}

f (x) = x^{2} - 10 x + 24

f (x) = 2 x + \frac{300000}{x}, 1 \leq x \leq 300

f (x) = - (x^{2} + x)^{\frac{2}{3}}

f (x) = - x^{4} + 4 x^{3}

What is the extreme f(x,y)=(xy)/((x^2-y^2)^2) ?
The extreme f(x,y)=(xy)/((x^2-y^2)^2) is None