(Ⅰ)求函数y=f(x)在点(1,f(1))处的切线方程;
(Ⅱ)令g(x)= +lnx,若函数y=g(x)在(e,+∞)内有极值,求实数a的取值范围;
(Ⅲ)在(Ⅱ)的条件下,对任意t∈(1,+∞),s∈(0,1),求证: .