Автор - alina2650
Ответ:
а) 7m-3/3m
б)4b+3a/ab
в)-y²+x²/xy
г)3k+4/k²+2k
д)a/6a²+7a+2
e)-1/x²-x
Объяснение:
a)2m-1/m + 1/3 = 3(2m-1)/3m = 6m-3+m/3m = 7m-3/3m
б)4-2a/a + 3+2b/b = b(4-2a)+a(3+2b)/ab = 4b+3a/ab
в)2x-y/x - 2y-x/y = y(2x-y)-x(2y-x) = 2xy-y²-2xy+x²/xy = -y²+x²/xy
г)2/k + 1/k+2 = 2(k+2)+k/k(k+2) = 2k+4+k/k²+2k = 3k+4/k²+2k
д)2a/2a+1 - 3a/3a+2 = 2a(3a+2) - 3a(2a+1)/(2a+1)(3a+2) = 6a²+4a-6a²-3a/6a²+4a+3a+2 = a/6a²+7a+2
e)x+1/x - x/x - 1= (x-1)(x+1)-x²/x(x-1) = x²-1-x²/x(x-1) = -1/x(x-1) = -1/x²-x