(2+1/a-1-1/a+1)÷(a-a/1-a²)化简
(a- 2a/a)÷1-a² / a²+a
(2+1/a-1-1/a+1)÷(a-a/1-a²)化简
化简:a/a-1÷(a-1/a)等于
化简a(a+2)-(a-1)(a+1)
化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)
化简(1 - 1/a-1)÷a²-4a+4/a²-a
a(a²-a-1)+1
先化简,再求值:【(a-2/a²+2a)-(a-1/a²+4a+4)】÷(a-4/a+2),其中a=
计算 (a²+2a分之a-2 - a²+4a+a分之a-1 ) ÷ a+2分之a-4
计算 看图 (a²+2a分之a-2 - a²+4a+a分之a-1 )÷ a+2分之a-4
a/a-1÷(a-a/2a-1)
(a 1)(a 2)(a 3)(a