What is the extreme f(x,y)=(5x)/(1+x^2+y^2) ?

The extreme f(x,y)=(5x)/(1+x^2+y^2) is None

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extreme f(x,y)=(5x)/(1+x^2+y^2)

extreme points

f (x, y) = \frac{5 x}{1 + x ^{2} + y ^{2}}

None

Solution steps

Find the critical points:

None

\frac{5 x}{1 + x ^{2} + y ^{2}}

has no critical points, therefore there are no extreme points

None

f (x) = x^{3} - 4 x + 6

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

f (x) = \frac{x}{2} - 3 sin (\frac{x}{3}), 0 \leq x \leq 2 π

f (x, y) = 81 - (x^{2} + y^{2})

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

What is the extreme f(x,y)=(5x)/(1+x^2+y^2) ?
The extreme f(x,y)=(5x)/(1+x^2+y^2) is None