题目nǎtou pihái zitou dinghaiyángzhi shirú guowá wahai daitiao yuan=((x+1))/((x-1)) kuan dabian huazuo yemao yigeng haogong yuánqicheshi qiáotong haohong ling jinf=- rac(1)f=9;f=-9. dui qimián huahuà shicong linpeng you=-1/2xnong man...