[問題] 電磁學圓柱影像法
http://ppt.cc/~PlA
如圖紅色框框所示
d1*d2 是解一元二次方程式而來的
為甚麼取解的時候
只要考慮"+"的那項?
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03/20 01:33, , 1F
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03/20 01:33, , 2F
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03/20 01:58, , 3F
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推
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03/20 13:01, , 7F
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三角不等式的概念 簡單明瞭 感謝!!
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03/20 16:49, , 8F
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03/20 16:49, , 9F
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展開是指?? 展開[x - sqrt(x^2 - y^2)] 嗎 ? 對不起數學有點差...
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請問等式是怎麼推導的呢?
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※ 編輯: p94107 (218.161.49.187), 03/21/2015 01:56:12
※ 編輯: p94107 (218.161.49.187), 03/21/2015 01:58:04
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03/21 11:16, , 18F
03/21 11:16, 18F
摁摁 我用Maclaurin Series 展開了 謝謝!!
※ 編輯: p94107 (218.161.49.187), 03/21/2015 14:27:38