Question

- 5/7 * (- 1, 4) * 3 1/2 * 2/7

Answer 1

Ответ:

$-\dfrac{5}{7} *(-1.4)*3\dfrac{1}{2} *\dfrac{2}{7}=1$

$-\dfrac{5}{7} *(-1.4)=-\dfrac{5}{7} *(-\dfrac{14}{10} )=\dfrac{2}{2} =1$

$1*3\dfrac{1}{2} =1*\dfrac{7}{2} =\dfrac{7}{2}$

$\dfrac{7}{2} *\dfrac{2}{7} =1$