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

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

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

extreme points

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

None

Solution steps

Find the critical points:

None

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

has no critical points, therefore there are no extreme points

None

y = cos (x) - 3 x

f (x) = x^{2} - 15 x + 26

y = x^{4} - x^{2}

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

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

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