Re: Re: [心情] 數學好難阿！！！消失
不推薦完全不背公式
如果沒有時間限制讓你慢慢玩的話是沒差
但是要考試、有時間限制、或是要算比較快的時候
難道你x^n的微分等於nx^(n-1)
和差化積、積化和差這種
還要慢慢推嗎
推完都下課囉
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