誰可以告訴我log的計算?

2011-06-23 7:38 am

圖片參考:http://imgcld.yimg.com/8/n/AC06389557/o/161106220978813872844270.jpg


麻煩請告訴我為什麼上式會變成紅線圈起來那一式? 謝謝:)

回答 (2)

2011-06-23 9:04 am
✔ 最佳答案
[log2_5+(-1/2)log2_5]*[(1/2)log5_2+(-2)log5_2]
=[(1-1/2)log2_5]*[(1/2-2)log5_2]
=[(1/2)log2_5]*[(-3/2)log5_2]



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