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Question

# Find the stationary points and use the method illustrated in earlier examples to determine the local extreme values.$f(x, y)=2 x+2 y-x^2+y^2+5$

Solution

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$\text{\textcolor{#000764}{ Find the stationary points and determine the local extreme values. }}$

\begin{aligned} &&\textcolor{#640000}{\;\;\;\;\;\;\;\;\;\;\;\;\;\; f (x, y) = 2x + 2y - x^2 + y^2 + 5. \;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;} \end{aligned}

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