a-maths~~!

2008-07-21 5:15 am
1.若曲綫y=lnx的切綫垂直於直綫2x-2y+3=0,求切綫方程。
2.曲綫y=xe-1上哪一點的切綫平行於x軸?求這切綫方程。
更新1:

2.曲綫y=xe^(-1)上哪一點的切綫平行於x軸?求這切綫方程。

更新2:

1 ans:x+y+e^(-2)=0 2 ans:(1,1/e) ,切綫方程y=1/e.

回答 (2)

2008-07-21 6:28 am
✔ 最佳答案
Please refer to the following solution:

圖片參考:http://hk.geocities.com/stevieg_1023/tangent.gif


2008-07-21 22:07:24 補充:
i can only answer this .........
2008-07-21 11:57 pm
is it really amaths?
it does not match the amaths syllabus!


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