Discuz Math Forum»Forum › Mathematics › High School › 椭圆证明斜率定值

Return to list New

View 1565|Reply 2

[几何] 椭圆证明斜率定值

[Copy link]

3159 Threads	7941 Posts	610K Credits

Credits: 63770

Send PM

hbghlyj Posted 2020-6-12 18:46 |Read mode

A，B，D是椭圆C的顶点，P是椭圆C上除顶点外的任意点，直线DP交x轴于点N直线AD交BP于点M，设BP的斜率为k，MN的斜率为m，证明2m-k为定值．

Reply Edit

13 Threads	907 Posts	110K Credits

Credits: 12299

Send PM

色k Posted 2020-6-12 18:53

是这个吗：forum.php?mod=viewthread&tid=3264

Reply Edit

107 Threads	225 Posts	2905 Credits

Credits: 2905

Send PM

facebooker Posted 2020-6-12 18:54

2013江西文科

Reply Edit

Return to list New

Mobile version|Discuz Math Forum

2025-5-31 11:06 GMT+8

Powered by Discuz!

× Quick Reply To Top Edit