I always tell myself .If at first I donot succeed,I will try again and again,I will not lost my hea
题目
I always tell myself .If at first I donot succeed,I will try again and again,I will not lost my hea
答案
我总是告诫我自己,即便是我一开始不成功,也没不要紧,我会一直努力下去,我不会失去信心.
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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．
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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