作者s1990716 (小婷)
看板trans_math
标题[微分] 应用问题
时间Tue Nov 25 00:02:24 2008
A(square)baseball diamond has sides that are 90 feet along. A player 26 feet
from third base is running at a speed of 30 feet per second. At what rate is
the player's distance from home plate changing ?
不清楚要怎麽设式呢......
请帮忙解惑~
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 122.116.127.139
1F：推 SDUM:dx/dt = 30 then d(90-x)/dt = -30 (．＿．?) 218.175.75.33 11/25 10:56