There are ______ hours in a week.
题目
There are ______ hours in a week.
A.onehundred and einhtyB.one hundred and eightyC.one hundred and eighty d.one hundred and sixty-eightD.onwhundred and eighty-six
答案
C
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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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