Пошаговое объяснение:
1) = 1/2 * 1/2 * (-1/2) = -1/8
2) =1/2 * 2/3 + 2/3 = 1/3 + 2/3 = 1
3) = -3/5 + 2/3 + 4/15 = 5/15 = 1/3
Пошаговое объяснение:
1) = 1/2 * 1/2 * (-1/2) = -1/8
2) =1/2 * 2/3 + 2/3 = 1/3 + 2/3 = 1
3) = -3/5 + 2/3 + 4/15 = 5/15 = 1/3