2012-20112011*2011-20122012（简便计算)
题目
2012-20112011*2011-20122012（简便计算)
答案
2012 - 20112011 * 2011 - 20122012= 2012 - 2011 * 10001 - 2012 * 10001= 2012 - (2011 + 2012) * 10001= 2012 - 2012 * 10001 + 10001= 2012 * (1 - 10001) + 10001= 2012 * (-10000) + 10000 + 1= 10000(1 - 201...
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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