Розділ 1. РАЦІОНАЛЬНІ ВИРАЗИ » 9.26

9.26 Знайдіть значення виразу (1 + (1 – 3–1)–1)–1 + (1 – (1 + 3–1)–1)–1 = 42/5. 1. (1 + (1 – 3–1)–1)–1 = (1 + (1 – 1/3)–1)–1 = (1 + (2/3)–1)–1 = (1 + 3/2)–1 = (5/2)–1 = 2/5; 2. (1 – (1 + 3–1)–1)–1 = (1 – (1 + 1/3)–1)–1 = (1 –(4/3)–1)–1 = (1 – 3/4)–1 = (1/4)–1 = 4; 3. 2/5 + 4 = 42/5.