自变量变换的综合应用示例 x()→x(3t 做法一:x()->x(t--)→>x(3 (3 t→t x( t→)3t 01/23/2 01/61/211 自变量变换的综合应用示例: 做法一: 1 ( ) (3 ) 2 x t x t 1 1 ( ) ( ) (3 ) 2 2 x t x t x t 0 1 x(t) t 1 0 t 1 1/2 3/2 0 t 1 1/6 1/2 1 ( ) 2 x t 1 (3 ) 2 x t 1 2 t t t 3t