What is the extreme f(x,y)=(x+4)/(y^2-x^2) ?

The extreme f(x,y)=(x+4)/(y^2-x^2) is None

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extreme f(x,y)=(x+4)/(y^2-x^2)

extreme points

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

None

Solution steps

Find the critical points:

None

\frac{x + 4}{y ^{2} - x ^{2}}

has no critical points, therefore there are no extreme points

None

f (x, y) = (x - 1)^{2} + y^{3} - 3 y^{2} - 9 y + 5

f (x) = 3 cos (3 x) + sin (3 x)

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

f (x, y) = x^{2} + 3 x y + y^{2} + 5 x - 7 y

f (x) = (x - 1)^{2} (x - 2) (x - 3)^{3}

What is the extreme f(x,y)=(x+4)/(y^2-x^2) ?
The extreme f(x,y)=(x+4)/(y^2-x^2) is None