ГДЗ Алгебра 8 клас Мерзляк (2025)

Виконайте дії:

1) 1^(\b)/(a(a+ b)) + 1^(\a)/(b(a+ b)) = (b+ a)/(ab(a+ b)) = 1/ab;
2) 4^(\b+2)/b – 8/(b(b+2)) = (4(b+2)-8)/(b(b+2)) = (4b+8-8)/(b(b+2)) = 4b/(b(b+2)) = 4/(b+2);
3) x^(\6)/(5(x+7)) – x^(\5)/(6(x+7)) = (6x-5x)/(30(x+7)) = x/(30x+210);
4) (4n+2^(\4) )/(3(n-1)) – (5n+3^(\3) )/(4(n-1)) = (4(4n+2)-3(5n+3))/(12(n-1)) = (16n+8-15n-9)/(12(n-1)) = (n-1)/(12(n-1)) = 1/12.