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