Last month she explained to one of her classes about sound,and she decided to test them to see how s
题目
Last month she explained to one of her classes about sound,and she decided to test them to see how successful she had been in her explanation.这句话啥意思?
答案
上个月,她向她的其中一个班讲解了什么是声音,然后她决定去考考他们,来看看自己在讲解声音这件事上有多成功.
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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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