若a>1,则a+1a-1有最______值为______;若a<1,则a+1a- 发布时间:2017-05-09 04:03 │ 来源:www.tikuol.com 题型:填空题 问题: 若a>1,则a+1a-1有最______ 值为______; 若a<1,则a+1a-1有最______ 值为______.