作者midarmyman (midarmyman)
看板trans_math
标题[积分]
时间Tue Jun 2 00:35:20 2009
找出z=x^2+y^2和z=4围成的立体 对Z轴的moment of inertia
each point density is proportional to the distance between the point and z轴
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※ 编辑: midarmyman 来自: 140.117.198.78 (06/02 00:38)