a-2/a²-1÷(a-1-2a-1/a+1)计算
问题描述:
a-2/a²-1÷(a-1-2a-1/a+1)计算
答
a-2/a²-1÷(a-1-2a-1/a+1)=a-2/a²-1÷((a²-1-(2a-1))/a+1)=a-2/a²-1÷((a²-1-2a+1)/a+1)=a-2/a²-1÷((a²-2a)/a+1)=(a-2)/(a-1)(a+1) * (a+1)/a(a-2)=1/a(a-1)...