4、时域微分性质 f(1)<>F(S) f(t d f(t d f(t L[f()=L["]=sF(S)-f(0) =sF(s)-2f(0)-s2f(0)-……-s2(0)-fn(0 闪四 西南交通大学西南交通大学 4、时域微分性质 f (t) « F(s) dt df t f t ( ) ¢( ) = n n n dt d f t f t ( ) ( ) = ] ( ) (0 ) ( ) [ ( )] [ = = - - ¢ sF s f dt df t L f t L [ ] ( ) (0 ) (0 ) (0 ) (0 ) 1 2 2 1 - - - - - - - - = - - ¢ - - - n n n n n n n s F s s f s f sf f dt d f L LL