What is the extreme f(x,y)=sqrt(1/(x-y)) ?

The extreme f(x,y)=sqrt(1/(x-y)) is None

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extreme f(x,y)=sqrt(1/(x-y))

extreme points

f (x, y) = \frac{1}{x - y}

None

Solution steps

Find the critical points:

None

\frac{1}{x - y}

has no critical points, therefore there are no extreme points

None

f (x) = \frac{x - 4}{x ^{2}}

f (x, y) = 10 + x^{2} + 2 y^{2}

f (x) = \frac{4 x ^{2}}{4 x - 8}

x^{4} - x^{3} - 3 x^{2} + 5 x - 2

2 x^{3} + 9 x y^{2} + 15 x^{2} + 27 y^{2}

What is the extreme f(x,y)=sqrt(1/(x-y)) ?
The extreme f(x,y)=sqrt(1/(x-y)) is None