[考古] 幾題考古
看板trans_math作者tim8238818 (AAAAAAAAAAAAAAAAAAAAAAA)時間16年前 (2009/11/16 21:59)推噓0(0推 0噓 2→)留言2則, 2人參與討論串1/1
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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※ 編輯: tim8238818 來自: 59.117.141.24 (11/17 18:49)