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

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

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extreme f(x,y)=sqrt(ln(1/(x+y)))

extreme points

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

None

Solution steps

Find the critical points:

None

ln (\frac{1}{x + y})

has no critical points, therefore there are no extreme points

None

f (x, y) = 4 x + 6 y

f (x) = x^{4} - 4 x^{3} + 5

x^{4} - 10 x^{2} + 9

P (x, y) = 3 x^{2} + 4 x y + y^{2} + 4 x + 2 y + 1

\frac{( x - 1 ) ^{2}}{x ^{2} + 1}

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