→ yyc2008:V = dr / dt122.124.107.213 11/16 22:12
→ ntust661:XDDD 140.118.234.83 11/16 23:03
※ 編輯: tim8238818 來自: 59.117.141.24 (11/17 18:49)
1.
A particle travels along the curve by x=t^2-7t+2 and y=t^2/4-6t for
t大於等於0. Deermine the time t at which the minimum speed occurs.
2.
The coordinates of an object moving in R^2 are:
x=4sin(t/2) and y=2tcos(t) for time t>0.
Calculate the lengh of the velocity vector of the object at time t=π/2.
我對時間微分的概念很差,希望板上高手指教@@
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北韓:大哥,我要試射核武囉
中共:喔,什麼時候,那時在通知一聲阿
北韓:十
中共:啥,十天?十星期?還是十月?
北韓:十,九,八,七...
中共:幹
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