還要會這個  我才會接受你的挑戰

 

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  進階的知識   

    兩個連續函數 f(x) g(x),且f(x) > g(x),對於所有的  x 屬於

    實數,則這兩個函數所交的面積為:

 

                                                                                                                       

                                                                                                                           然後....