∫(x+1)/[(x-1)(x^2-1)] dx (题目,是不是都是分母?)
=∫(x+1)/[(x-1)(x-1)(x+1)] dx
=∫1/(x-1)² dx
=-1/(x-1)+C
要是答案认可的话,还请及时采纳,点击满意按钮,