What is the FUNCTION_MANY#extreme f(x,y)=x^2+y^2+x+y+xy ?

The FUNCTION_MANY#extreme f(x,y)=x^2+y^2+x+y+xy is Minimum(-1/3 ,-1/3)

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FUNCTION_MANY#extreme f(x,y)=x^2+y^2+x+y+xy

extreme

Minimum (- \frac{1}{3}, - \frac{1}{3})

Solution steps

Find the critical points:

(- \frac{1}{3}, - \frac{1}{3})

\frac{\partial ^{2} f}{\partial x ^{2}} = 2

D (x, y) = 3

Check the sign of at each critical point

Check critical point

(- \frac{1}{3}, - \frac{1}{3}) :

Minimum

Minimum (- \frac{1}{3}, - \frac{1}{3})

What is the FUNCTION_MANY#extreme f(x,y)=x^2+y^2+x+y+xy ?
The FUNCTION_MANY#extreme f(x,y)=x^2+y^2+x+y+xy is Minimum(-1/3 ,-1/3)