Question

617. Найдите значение выражения:​

Answer 1

Пошаговое объяснение:

№1

-5/8 * (-4/5) * (-3/4) * (-2/3) * (-1/2)

-1/2 * (-1/1) * (-1/2) * (-1/1) * (-1/2) = -1/8

№2

-7/12 * (-6/7) * (-5/6) * (-4/5) + 2/3 =

-1/2 * (-1/1) * (-1/3) (-2/1) + 2/3 =

2/6 + 2/3 = 1/3 + 2/3 = 3/3 = 1

№3

-11/15 * (-10/11) * (-9/10) + (-7/9) * (-6/7) + 4/15 =

-11/15 * (-1/11) * (-9/1) + (-1/3) * (-2/1) + 4/15 =

-11/15 * 9/11 + 2/3 + 4/15 =

-1/5 * 3/1 + 2/3 + 4/15 =

-3/5 + 2/3 + 4/15 =

-9/15 + 10/15 + 4/15 = 5/15 = 1/3