推 midarmyman:用PAPPUS吧! 140.117.198.78 05/22 21:34
→ GLP:算出來是多少呢? 58.115.135.114 05/22 21:50
推 midarmyman:2(pi)^2(r^3)? 140.117.198.78 05/22 22:48
旋轉體積一題 當年占了15分
A semi-circular region of radius r is rotated about
the line L which is the tangent line parallel to the
diameter. Find the colume volume.
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