作者chingyes (axsazxc)
看板trans_math
标题[微分]质心的小问题
时间Mon Jul 7 22:36:18 2008
suppose that (X爸.Y爸)is the centroid of region bounded by the graph of the
parametric equations x=t-sint ,y=1-cost ,0<t<拍 and the x-axis
Find Y爸=?
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