[其他] 請問圓錐曲線的證明
如題 小弟在算中學圓錐曲線的時候發現有
半焦距的平方=實半轴的平方+虛半轴的平方
(a2 +b2 =c2 ) 卡在這裏，我想請問這條式子有無證明，還是僅僅只是原則而已。
謝謝各位
-----
Sent from JPTT on my LGE LG-H815.
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 180.204.114.254
※ 文章網址: https://www.ptt.cc/bbs/Math/M.1474518814.A.DC8.html
→
09/22 12:43, , 1F
09/22 12:43, 1F
→
09/22 12:44, , 2F
09/22 12:44, 2F
→
09/22 16:08, , 3F
09/22 16:08, 3F
→
09/22 17:42, , 4F
09/22 17:42, 4F
推
09/22 21:46, , 5F
09/22 21:46, 5F
→
09/22 21:46, , 6F
09/22 21:46, 6F
→
09/22 21:47, , 7F
09/22 21:47, 7F
→
09/22 21:47, , 8F
09/22 21:47, 8F
→
09/22 21:47, , 9F
09/22 21:47, 9F
→
09/22 21:48, , 10F
09/22 21:48, 10F
推
09/23 01:38, , 11F
09/23 01:38, 11F
→
09/23 01:39, , 12F
09/23 01:39, 12F
→
09/23 01:40, , 13F
09/23 01:40, 13F
→
09/23 08:21, , 14F
09/23 08:21, 14F
→
09/23 08:22, , 15F
09/23 08:22, 15F