Вычислите: (1 1/4)^2.

Ответ:

\[\left( 1\frac{1}{4} \right)^{2} = \left( \frac{5}{4} \right)^{2} = \frac{5^{2}}{4^{2}} = \frac{25}{16} = 1\frac{9}{16}\]