Вправи 201 - 342 » 230

230. Знайдіть значення виразу: 1) 20–2 = 1/20^2 = 1/400; 2) (0,3)–1 = (3/10)–1 = 10/3 = 31/3; 3) (–6)–3 = 1/〖(-6)〗^3 = 1/(-216) = –1/216; 4) (4/7)–2 = (7/4)2 = 49/16 = 31/16; 5) (–1/6)–3 = (–6)3 = –216; 6) (31/3)–2 = (10/3)–2 = (3/10)2 = 9/100.