Question

Dê o valor da expressão(1/5+1/3): (3/5-1/15) + 0,999...

Answer 1

$( \frac{1}{5} + \frac{1}{3} )/( \frac{3}{5} - \frac{1}{15} )+0,999\\\\( \frac{8}{15} )/( \frac{8}{15} )+0,999\\\\ \frac{8}{15} * \frac{15}{8} +0,999\\\\ \frac{120}{120} +0,999=1+0,999=1,999$