[中學] 空間向量
正四面體的四個落在以原點為球心,
半徑為1的球面上,已知一頂點P的坐標
為(0,0,1),另外三頂點為Q1(a1,b1,c1)
Q2(a2,b2,c2),Q3(a3,b3,c3)
問:a1b1+a2b2+a3b3最大值是否為4/3
請問要怎麼說明?
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推
12/20 00:00, , 1F
12/20 00:00, 1F
推
12/20 00:02, , 2F
12/20 00:02, 2F
→
12/20 00:04, , 3F
12/20 00:04, 3F
→
12/20 00:05, , 4F
12/20 00:05, 4F
→
12/20 00:07, , 5F
12/20 00:07, 5F
推
12/20 02:11, , 6F
12/20 02:11, 6F
→
12/23 00:04, , 7F
12/23 00:04, 7F
討論串 (同標題文章)