作者gs86137 (小飞鱼)
看板trans_math
标题[考古]九十七年元智大学
时间Sun Jun 27 00:11:23 2010
Find the center of mass of the solid bounded by z = 4 - x^2 - y^2
and above the square with vertices (1,1) (1,-1) (-1,-1) and (-1,1)
if the density is p = 3
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