encuentra el valor de XXX: [tex]\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \pi \sqrt[n]{x} \frac{x}{y} \beta x_{123} x_{123} x_{123} \int\limits^a_b {x} \, dx \left \{ {{y=2} \atop {x=2}} \right. \\ \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] x_{123} \beta \frac{x}{y} \alpha \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt[n]{x} \pi \lim_{n \to