Вправа 201 - 300 » 275-276

275. Спрости вираз. a) 3x/8a : (x/y • y/4a) = 3x/8a : xy/4ya = (3x•4ya)/(8a• xy) = 3/2 = 11/2; б) (4/m • x/2m)2 : 〖6x〗^3/m^2 = (16•x^2 • m^2)/(m^2•〖4m〗^2 • 〖6x〗^3 ) = 2/〖3xm〗^2 . 276. Спрости вираз. a) 〖-5a〗^2/〖4c〗^3 : (a^3/〖2c〗^3 : a/c^2 ) = 〖-5a〗^2/〖4c〗^3 : (a^3 c^2)/(〖2c〗^3 a) = (〖-5a〗^2• 〖2c〗^3 a)/(〖4c〗^3• a^3 c^2 ) = (-5)/〖2c〗^2 ; б) 〖-9c〗^2/5a : (3c/〖5a〗^2 • a/c)3 = 〖-9c〗^2/5a : (3c/〖5a〗^2 )3 = 〖-9c〗^2/5a : 〖27c〗^3/〖125a〗^6 = (〖-9c〗^2• 〖125a〗^6)/(5a•〖27c〗^3 ) = –〖27a〗^5/75c.