作者STARS74721 (....)
看板trans_math
标题微分还有一题看不太懂的题目..
时间Sat Jun 25 12:50:10 2005
1.
oo
Ｓ x2^-x dx
0
2. suppose that volume of air inhaled by person during respiration is given
by v(t)=6/5拍(1-sin拍t/2) for t大於等於0 liters at time t (in seconds)
when is the volume of inhaled air at a maximum? what is maximum volume?
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