101年地特工程數學 - 特考

By John
at 2013-05-01T09:11
at 2013-05-01T09:11
Table of Contents
我想請教101年地方特考三等,工程數學選擇題最後一題...
是機率問題,題目如下,答案是0,選項(A):
http://ppt.cc/-nLW
我的想法是,應該要轉成極座標來積分求期望值吧?
可是算式不知道怎麼寫 Orz
請教版上的高手們,有沒有人能幫忙解惑...感激不盡
謝謝!
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特考
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