Question

Dau coroana si 55 puncte .
Aratati ca numarul $1,(3) impartit la \frac{(2)}{(3)} ^{2}$ este natural .

Answer 1

$1.(3) \div \frac{2}{3}^{2} = \\ \frac{13 - 1}{9} \div \frac{4}{9} = \\ \frac{12}{9} \times \frac{3}{4} = \\ \frac{4}{3} \times \frac{3}{4} = \\ 1$