The man took a knife out of his pocket and said to the

The man took a knife out of his pocket and said to the

题目
The man took a knife out of his pocket and said to the
答案
这个男人从口袋里掏出一把刀子,对店员说...
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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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