РОЗДІЛ 2. Раціональні вирази - Вправи 50 - 200 » 151

151. Знайдіть суму дробів: 1) 2^(\4)/3ab + 3/12ab = (8+3)/12ab = 11/12ab; 2) 5y/36ac + 〖4y〗^(\4)/9ac = (5y+16y)/36ac = 21y/36ac = 7y/12ac; 3) x^(\7)/(〖4a〗^2 b) + 〖3x〗^(\2)/(〖14a〗^2 b) = (7x+6x)/(〖28a〗^2 b) = 13x/(〖28a〗^2 b); 4) 〖3a〗^(\5)/(5(a+b)) + 6a/(25(a+b)) = (15a+6a)/(25(a+b)) = 21a/(25(a+b)); 5) 〖4y〗^(\5)/(3(a-c)) + 7y/(15(a-c)) = (20y+7y)/(15(a-c)) = 27y/(15(a-c)) = 9y/(5(a-c)); 6) 〖3x〗^(\3)/(8(a-2b)) + 〖5x〗^(\4)/(6(a-2b)) = (9x+20x)/(24(a-2b)) = 29x/(24(a-2b)).