only students could work out the problem ,becaude it is too difficult
题目
only students could work out the problem ,becaude it is too difficult
答案
only calibre students 才华生
only elite students 精英生
only first-class students 优等生
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．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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