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

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

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

extreme points

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

None

Solution steps

Find the critical points:

None

\frac{x + y}{x ^{2} - y ^{2}}

has no critical points, therefore there are no extreme points

None

f (x) = 3 x^{2} - 12 x + 9

f (x) = \frac{10}{3} x^{3} - x^{2} - 8 x + 48

f (x, y) = x y - 2 x - y

f (x) = x^{2} - 6 x - 7

f (x) = x e^{5 x^{2}}

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