Вправи 801- 887 » 885

885. Спростіть вираз. a) 0,2x–2y • 5x2y–2 = 1 • x0y–1 = 1/y; б) (a–1 + b–1) • (a + b)–1 = (1/a + 1/b) • 1/(a+b) = (b+a)/ab • 1/(a+b) = 1/ab; в) ((m^4 n^(-2))/9p)2 • ((m^2 n^(-3))/3p)–3 = (m^8 n^(-4))/〖81p〗^2 • (m^(-6) n^9)/(3^(-3) p^(-3) ) = (m^8 n^9 • 〖27p〗^3)/(〖81p〗^2 n^4 m^6 ) = (m^2 n^5 p)/3; г) ((a^4 b^(-3))/c^5 )–3 • (c^8/ab^3 )2 = (a^(-12) b^9)/c^(-15) • c^16/(a^2 b^6 ) = (b^3 • c^31)/a^14 .