Question

(2/3)^-2-(2 1/2)^-1+(-5/2)^-2

Answer 1

Объяснение:

$( \frac{2}{3} ) ^{ - 2} - {( 2\frac{1}{2}) }^{ - 1} + {( - \frac{5}{2}) }^{ - 2} = \frac{9}{4} - \frac{2}{5} - \frac{4}{25} = \frac{9}{4} - \frac{10 - 4}{25} = \frac{9}{4} - \frac{6}{25} = \frac{225 - 24}{100} = \frac{201}{100} = 2 \frac{1}{100} = 2.01$