(a+1)/(a-1)-(a^2+a)/(a^2-1) 赶快的哦

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(a+1)/(a-1)-(a^2+a)/(a^2-1)赶快的哦(a+1)/(a-1)-(a^2+a)/(a^2-1)赶快的哦(a+1)/(a-1)-(a^2+a)/(a^2-1)赶快的哦答案是:1/(

(a+1)/(a-1)-(a^2+a)/(a^2-1) 赶快的哦
(a+1)/(a-1)-(a^2+a)/(a^2-1) 赶快的哦

(a+1)/(a-1)-(a^2+a)/(a^2-1) 赶快的哦
答案是:1/(a-1)

1/(a-1). 化简(a+1)/(a-1) - a(a+1)/(a+1)(a-1) 再化简(a+1)/(a-1) -a/(a-1) 通分得结果

1点半的课

(a+1)/(a-1)-(a^2+a)/(a^2-1)
=(a+1)^2/(a^2-1)-a(a+1)/(a^2-1)
=[(a+1)^2-a(a+1)]/(a^2-1)
= {(a+1)[(a+1)-a ]}/(a^2-1)
=(a+1)/(a^2-1)
=1/(a-1)