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Information on this item has been restored from offli.
Information on this item has been restored from offline files and will be available online for 30 days from 09/20/2011.
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这个项目的信息从离线文件里恢复了,将在线上保留30天（从09/20/2011起）
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
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