[tex]\left \{ {{y=2} \atop {x=2}} \right. x^{2} \left[\begin{array}{ccc}1&2& ;3\\4&5&6\\7&8&9\en d{array}\right] \lim_{n \to \infty} a_n \frac{x}{y} \left[\begin{array}{ccc}1&2& ;3\\4&5&6\\7&8&9\en d{array}\right] \left[\begin{array}{ccc}1&2& ;3\\4&5&6\\7&8&9\en d{array}\right] \int\limits^a_b {x} \, dx \geq x^{2} \\ \leq \int\limits^a_b {x} \, dx \geq x^{2} \sqrt{x} \neq \neq \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2& ;3\\4&5&6\\7&8&9\en d{array}\right] ???