Question

efectuati calculelel a)( 3pe 4 -1pe3):(4pe5)la puterea -1

Answer 1

$( \frac{3}{4} - \frac{1}{3} ) : ( \frac{4}{5} )^{-1}= \\ \\ \frac{3}{4} - \frac{1}{3} = \frac{9}{12} - \frac{4}{12} = \frac{5}{12} \\ \\ (\frac{4}{5} )^{-1} = \frac{5}{4} } \\ \\ =\frac{5}{12} : \frac{5}{4} = \frac{5}{12} \times \frac{4}{5} = \frac{20}{60} = \frac{1}{3}$

Answer 2

ai rezolvarea în imagine