tolong isi 2,3,dan 4 yang no 4 tolong pake cara

e haya tuhan yang tau[tex] \frac{x}{y} x^{123} \geq \pi \frac{x}{y} \sqrt{x} \\ \lim_{n \to \infty} a_n \sqrt{x} \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] x_{123} [/tex]