【数学分式计算,要过程】a²分之（a²-ab）÷（b分之a-a分之b

1、=a(a-b)/a²÷(a²-b²)/ab
=(a-b)/b×ab/(a+b)(a-b)
=a/(a+b)

2、=(a+1)²/(a+1)(a-1)-1/(a-1)
=(a+1)/(a-1)-1/(a-1)
=1/(a-1)