作者kentarosu (肯泰羅)
看板trans_math
標題[考古] 98政大國貿微積分
時間Fri Jun 18 23:00:07 2010
98年政大國貿微積分第10題
原考題：
http://img638.imageshack.us/img638/9569/22679131.jpg
A ladder 26 ft long leans against a vertical wall. If the lower end is moved
away from the wall at the rate of 5(ft/sec), how fast is the height of the
top decreasing when the the lower end is 10 ft from the wall?
不知道該怎麼解
想請大家幫忙給一些頭緒
若能幫忙詳細解答更佳^^"
拜託了 感謝~
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◆ From: 114.33.56.62
1F：推 a039333780:畢氏定理+全微分 122.117.249.30 06/19 00:54
2F：推 a039333780:x^2+y^2=26^2 122.117.249.30 06/19 01:25
3F：→ a039333780:對t微分 然後題目給的帶進去 122.117.249.30 06/19 01:26
4F：→ a039333780:dx/dt=5 且x=10 故y=24 (畢氏定理) 122.117.249.30 06/19 01:27
5F：→ a039333780:只剩下dy/dt待解而已= = 122.117.249.30 06/19 01:27
6F：→ a039333780:這題也算長考的題目@@@@ 122.117.249.30 06/19 01:28