1. Раціональні вирази - Вправи 1- 100 » 95

Виконайте додавання або віднімання дробів: 1) (9-5b^(\c))/b – (7-5c^(\b))/c = (c(9-5b)- b(7 -5c))/bc = (9c-5bc-7b+5bc)/bc = (9c-7b)/bc; 2) (4d+7^(\6) )/7d – (d-6^(\7) )/6d = (6(4d+7)-7(d-6))/42d = (24d+42-7d+42)/42d = (17d+84)/42d; 3) (m-n^(\n) )/mn – (p-n^(\m) )/np = (nm-n^2-mp+ mn )/mnp = (2mn- n^2- mp)/mnp; 4) (6a+2^(\a) )/ab – (2a+4^(\1) )/(a^2 b) = (a(6a+2)-(2a+4))/(a^2 b) = (6a^2+2a-2a-4)/(a^2 b) = (6a^2-4)/(a^2 b); 5) 1^(\x^2 )/x^3 – (1+x^2 )/x^5 = (x^2-(1+x^2) )/x^5 = (x^2-1-x^2 )/x^5 = 1/x^5 ; 6) (1- ab^(\d))/abc + (1- ad^(\b))/acd = (d(1-ab)- b(1- ad))/abcd = (d- abd- b+ abd)/abcd = (d- b)/abcd.