[轉錄]美國知名大學電磁學課所用的證明... (應該沒有 …
※ [本文轉錄自 DennisKao 信箱]
作者: improvise (hehe) 看板: joke
標題: 美國知名大學電磁學課所用的證明... (應該沒有op吧)
時間: Tue Oct 23 18:02:55 2007
1 1
Given -- = 0 , prove -- = ∞
∞ 0
Ans:
1. 1
-- = 0
∞
=> -18 ║ 0 rotate anticlockwisely by 90 degree
-18 0
2. + 8 + 8 (+8 to both sides)
------------
=> -10 ║ 8
3. -10 ║ 8
1
=> -- = ∞ rotate clockwisely by 90 degree
0
proved!
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