A:which are not
B:that have not bee
C:that has not
D:that has not bee
如图是某城市局部街道示意图,某人想从街道口A沿街道口B,要使走的路程最短,不同的走法有( )种.
已知指数函数f(x)=ax(a>0,且a≠1)图象过点(3,18).
(1)求f(x)的解析式;
(2)利用第(1)的结论,比较a﹣0.1与a﹣0.2的大小.