Question

равно ли 1\-4 к -7\28

Answer 1

$\displaystyle\bf\\\frac{1}{-4} =-\frac{1}{4} \\\\\\\frac{-7}{28} =-\frac{7}{28} =-\frac{7:7}{28:7} =-\frac{1}{4} \\\\\\Otvet \ : \ \frac{1}{-4} =\frac{-7}{28}$