通分:(1)1/x(y-x),1/2x-2y(2)5/2(x-2),4/3(2-x)²(3)x/a(x-y),y/b(y-x)

问题描述:

通分:(1)1/x(y-x),1/2x-2y(2)5/2(x-2),4/3(2-x)²(3)x/a(x-y),y/b(y-x)

(1)1/x(y-x),1/2x-2y
-2/2x(x-y),x/2x(x-y)
(2)5/2(x-2),4/3(2-x)²
15(x-2)/6(x-2)²,8/6(x-2)²
(3)x/a(x-y),y/b(y-x)
b x/ab(x-y),-ay/ab(x-y)