Question

(AUB)-C=(A-C)U(B-C) prove that

Answer 1

$\left \{ {{y=2} \atop {x=2}} \right. \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt[n]{x} \sqrt{x} \leq \geq x^{123} x_{123}$