Задачі і вправи для повторення » 15

15. Спростіть вираз: 1) a–10 : a–6 • a–5 = a–10–(–6)–5 = a–10+6–5 = a–9; 2) a–10 : a6 • a–5 = a–10–6–5 = a–21; 3) a–10 : a–6 : a–5 = a–10–(–6)–(–5) = a–10+6+5 = a1 = a; 4) a–10 • a–6 • a–5 = a–10–6–5 = a–21; 5) a0 : a–8 • a–12 = a0–(–8)–12 = a8–12 = a–4; 6) a0 : (a–8 • a–12) = a0 : a–20 = a0–(–20) = a20; 7) (a–4)–3 : (a3)4 = a12 : a12 = 1; 8) (a–4)–3 • (a3)4 = a12 • a12 = a24. 9) (a–10a40)–3 : (a10a–30)0 = a30a–120 : 1 = a–90; 10) (a–10a40)0 : (a10a–30)0 = 1 : 1 = 1.