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寫的不是很清楚,導數管什麼的? 對式子f(x)+2f'(1)=1+(lnx)/2兩邊關於x求導: f'(x)=1/(2x),所以f'(1)=1/2, 從而f(x)=-2f'(1)+1+(lnx)/2 =(lnx)/2
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