[理工] [工數]-拉式......
2
-1 s + 1
L [ln----------]
2
(s - 1)
答案
2 t
---(e - cost)
t
幫我檢查哪裡錯...
2
1 -1 d s + 1
- --- L [ --- ln ------- ]
t ds 2
(s-1)
2
1 -1 s - 2s +1
= - --- L [ ----------- ]
t 2
s + 1
2
1 -1 s -1 s -1 1
= - --- { L [ ------- ] - 2 L [ ------- ] + L [ -------- ]
t 2 2 2
s + 1 s + 1 s + 1
1 d -1 s
= - ---[ --- L [ ------- ] - 2cost + sint ]
t dt 2
s + 1
1
= - ---[-2cost] ..............................
t
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.32.91.86
推
02/05 13:55, , 1F
02/05 13:55, 1F
推
02/05 13:59, , 2F
02/05 13:59, 2F
→
02/05 14:00, , 3F
02/05 14:00, 3F
→
02/05 14:11, , 4F
02/05 14:11, 4F
→
02/05 15:34, , 5F
02/05 15:34, 5F
討論串 (同標題文章)
以下文章回應了本文：
完整討論串 (本文為第 1 之 2 篇)：