Question

determinați valorile lui n €N pentru care avem 1/2 mai mic n+2/4mai mic 5/3

Answer 1

$\frac{1}{2} < n + \frac{2}{4} < \frac{5}{3}$
scădem 2/4--->
$\frac{1}{2} - \frac{2}{4} < n < \frac{5}{3} - \frac{2}{4}$
aducem la același numitor----->
$\frac{2}{4} - \frac{2}{4} < n < \frac{20}{12} - \frac{6}{12}$
----->
$0 < n < 1$
---> n €(0,1)