Вправи 301 - 400 » 341

341. Знайдіть х: 1) (4 • 5)–3 = x • 5–3; 4–3 • 5–3 = x • 5–3 |: 5–3; x = 4–3 = 1/4^3 = 1/64. 2) (2 • 15)–6 = 15–6 • x 2–6 • 15–6 = 15–6 • x |: 15–6; x = 2–6 = 1/2^6 = 1/64. 3) (2 • 3 • 4)–2 = x • 2–2 • 4–2; 2–2 • 3–2 • 4–2 = x • 2–2 • 4–2; 3–2 • 8–2 = x • 8–2 |: 8–2; x = 3–2 = 1/3^2 = 1/9. 4) (3/8)–6 = x^(-6)/8^(-6) ; 3^(-6)/8^(-6) = x^(-6)/8^(-6) ; x = 3.