[中學] 空間球面與圓錐曲線的問題
空間中一球面S:x^2+(y-2)^2+(z-2)^2=2,由點A(0,4,4)置一光源照射球面,
求球面S在xy平面上的影子輪廓的方程式。
我猜是橢圓,但是不知道怎麼算,如何把方程式求出來呢?
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推
11/17 21:43, , 1F
11/17 21:43, 1F
→
11/17 21:43, , 2F
11/17 21:43, 2F
→
11/17 21:54, , 3F
11/17 21:54, 3F
推
11/17 21:54, , 4F
11/17 21:54, 4F
推
11/17 22:15, , 5F
11/17 22:15, 5F
→
11/17 23:08, , 6F
11/17 23:08, 6F
→
11/18 00:40, , 7F
11/18 00:40, 7F
→
11/18 19:46, , 8F
11/18 19:46, 8F
→
11/18 19:57, , 9F
11/18 19:57, 9F
→
11/18 19:57, , 10F
11/18 19:57, 10F
推
11/18 21:44, , 11F
11/18 21:44, 11F
→
11/18 22:30, , 12F
11/18 22:30, 12F
→
11/18 22:37, , 13F
11/18 22:37, 13F
推
11/18 23:55, , 14F
11/18 23:55, 14F
→
11/19 12:00, , 15F
11/19 12:00, 15F
→
11/19 12:20, , 16F
11/19 12:20, 16F
→
11/19 12:27, , 17F
11/19 12:27, 17F
→
11/19 12:27, , 18F
11/19 12:27, 18F