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[函数] 函数问题一例

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APPSYZY Posted 2017-11-10 09:11 |Read mode
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kuing Posted 2017-11-10 12:27
这题也太水了吧,要满足 $1+xf(x)=0$ 不就只能 $f(x)=-1/x$ 吗?这时显然不满足那个极限式,所以就不存在咯

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