Find the area of the region enclosed by the intersection of
the plane px+qy+rz=0 and the ellipsoid (x/a)²+(y/b)²+(z/c)²=1,
where p²+q²+r²=1 and a, b, c > 0.
收錄日期: 2021-04-23 23:26:09
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https://hk.answers.yahoo.com/question/index?qid=20120505000051KK00030