B(B,-1/B),D(-B, 1/B)
BD的斜率是-1/B²,xy=1過A點的切線也是-1/B²(因為平行於BD)
所以A=B , 同理C=B
A=B=C=D
B(B,-1/B),D(-B, 1/B)
BD的斜率是-1/B²,xy=1過A點的切線也是-1/B²(因為平行於BD)
所以A=B , 同理C=B
A=B=C=D
• 問題在同理上,B,D切線平行,A,C切線平行,隻有B=D,A=C, -jinjing- ♀ (33 bytes) () 07/03/2011 postreply 08:38:39
• 你糊塗了吧? -15少- ♂ (89 bytes) () 07/03/2011 postreply 08:59:03
• 可能有誤解,我拿了筆,是不大糊塗大的. -jinjing- ♀ (0 bytes) () 07/03/2011 postreply 10:04:32
• 後麵用什麽都行 -說了就走- ♂ (358 bytes) () 07/03/2011 postreply 20:40:08
• 對不起,您的"然後就要具體計算切線了,很簡單但是沒什麽意思了。" -jinjing- ♀ (31 bytes) () 07/04/2011 postreply 06:58:50
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy