作者BaBi (迅雷不及掩耳盗铃)
看板trans_math
标题Re: [考古] 元智101
时间Fri Jul 19 22:51:51 2013
※ 引述《iamphilip526 (Philip)》之铭言：
: Find the equation of the tangent line for the curve represented by x = √t and
: y= (1/2) t^2 at the point where t=4 .
: 在此先谢谢各位大大了 ><
dy | dy/dt | t |
---- | = ------- | = -------------- | = 16
dx |t=4 dx/dt |t=4 1/[2sqrt(t)] |
|
(x,y)| = (2,8)
|t=4
Equation of the tangent line
(y-8) = 16(x-2)
=> 16x-y = 24
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 36.234.226.221
1F：推 iamphilip526:谢谢BaBi大..效率超高!!! 61.58.173.170 07/19 23:01
修正下笔误
※ 编辑: BaBi 来自: 36.234.224.120 (07/21 19:35)