[理工] [工數]-高階ODE
看板Grad-ProbAsk作者ERICMASON (Open my mind)時間16年前 (2009/11/24 23:13)推噓3(3推 0噓 8→)留言11則, 4人參與討論串21/46 (看更多)
y" = k√[1+(y')^2]
令 y' = z y" = dz/dk
dz/dk = k√[1+(z)^2]
dz/√[1+(z)^2] = k dk
-1 1
Sinh z = —k^2 +c
2
y' = Sinh(1/2 k^2+c)
再來我就卡關了 我積不回去
有高手可以教我嗎 QQ
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.125.41.142
推
11/24 23:35, , 1F
11/24 23:35, 1F
→
11/24 23:38, , 2F
11/24 23:38, 2F
推
11/25 00:39, , 3F
11/25 00:39, 3F
→
11/25 00:39, , 4F
11/25 00:39, 4F
→
11/25 00:51, , 5F
11/25 00:51, 5F
→
11/25 01:28, , 6F
11/25 01:28, 6F
推
11/25 01:50, , 7F
11/25 01:50, 7F
→
11/25 01:55, , 8F
11/25 01:55, 8F
→
11/25 02:06, , 9F
11/25 02:06, 9F
→
11/25 02:07, , 10F
11/25 02:07, 10F
→
11/25 02:08, , 11F
11/25 02:08, 11F
討論串 (同標題文章)