Вправи 201 - 342 » 267

267. Знайдіть значення виразу: 1) 95 • 9–7 = 95+(–7) = 9–2 = 1/9^2 = 1/81; 2) 10–8 • 1012 = а–8+12 = 104 = 10 0 00; 3) З–18 : З–21 = а–18–(–21) = 33 = 27; 4) 2–9 • 2–12 : 2–22 = 2–9+(–12)–22 = 21 = 2; 5) (174)–12 • (17–6)–8 = 17–48 • 1748 = 17–48+48 = 170 = 1; 6) (6^(-5) • (6^(-3) )^4)/((6^(-7) )^2 • 6^(-3) ) = (6^(-5) • 6^(-12))/(6^(-14) • 6^(-3) ) = 6^(-17)/6^(-17) = 1; 7) 3–3 • (2/3)–3 = 3–3 • 2–3 : 3–3 = 2–3 = 1/2^3 = 1/8; 8) 14^(-5)/7^(-5) = ((2 • 7)^(-5))/7^(-5) = (2^(-5) • 7^(-5))/7^(-5) = 2–5 = 1/2^5 = 1/32.