Назад
ГДЗ Алгебра 8 клас Істер (2025)
Розділ 1. РАЦІОНАЛЬНІ ВИРАЗИ
Реклама:
12.26 Спростіть вираз:
1) (2/3a–1b)–2 • (9/10a–3b–2)–1 = 9/4a2b–2 • 10/9a3b2 = 2,5a5; 2) ((4mn^(-2))/5a)–1 • 8m–3n–2a5 = (5a • 8m^(-3) n^(-2) a^5)/(4mn^(-2) ) = 10a6m–2 = (10a^2)/m^2 .
12.27 Обчисліть
((1 – (1 + 2–1)–1)–1)–4 = ((1 – (1 + 1/2)–1)–1)–4 = ((1 –(3/2)–1)–1)–4 = (1 – 2/3)4 = (1/3)4 = 1/81.
1) (2/3a–1b)–2 • (9/10a–3b–2)–1 = 9/4a2b–2 • 10/9a3b2 = 2,5a5; 2) ((4mn^(-2))/5a)–1 • 8m–3n–2a5 = (5a • 8m^(-3) n^(-2) a^5)/(4mn^(-2) ) = 10a6m–2 = (10a^2)/m^2 .
12.27 Обчисліть
((1 – (1 + 2–1)–1)–1)–4 = ((1 – (1 + 1/2)–1)–1)–4 = ((1 –(3/2)–1)–1)–4 = (1 – 2/3)4 = (1/3)4 = 1/81.