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這個e主要在高數上應用,比如說函數y=e^x,過影像上任一點(X0,Y0)做影像的切線,那麼這條切線的斜率恰好是Y0.而其他數做底數就沒有這種規律.類似的神奇之處還有很多,比如e^(iA)=cosA+ isinA等等,總之這個數很神奇,真的很神奇,學多了自然就明白了,現在不用著急.
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