Cálculo Diferencial e Integral III

1/x+y > 0
x+y > 0
D={(x,y) E R^2/ x>-y}

\(\[\begin{align} & fun\tilde{a}o: \\ & \text{ }f\left( x,y \right) \\ & =raiz\left( \frac{1}{x+y} \right) \\ & Dom\acute{i}nio: \\ & ~\surd x\text{ }+y \\ & x+y\text{ }\ge 0 \\ & \text{Portanto:} \\ & x\ge -y \\ & Logo: \\ & D=\left\{ \text{ }x\in \text{ }\frac{R}{\text{ }x}\ge \text{ }-y \right\} \\ \end{align}\] \)