Розділ 1. РАЦІОНАЛЬНІ ВИРАЗИ » 9.25

9.25 Обчисліть: 1) (1 + 1 – 5 –2)–1)–1 = (1 + (1 – 1/25)–1)–1 = (1 + (24/25)–1)–1 = (1 + 25/24)–1 = (49/24)–1 = 24/49; 2) (1 – (1 + 3–1)–2)–2 = (1 – (1 + 1/3)–2)–2 = (1 – (4/3)–2)–2 = (1 – 9/16)–2 = (7/16)–2 = 256/49 = 511/49.