(Ⅰ)当a=1时,求函数f(x)在点(2,f(2))处的切线方程;
(Ⅱ)若函数g(x)有两个零点,试求a的取值范围;
(Ⅲ)证明f(x)≤g(x)
Well , ____( thanksgiving ) is my favourite festival.
在市区增加绿地面积可以减弱“热岛效应”的危害