想了很久都没想出的数学题
题目
想了很久都没想出的数学题
若关于X的不等式|x-1|>a-x仅有正数解,则实数a的范围是?
答案
当x>=1
x-1>a-x
a<2x-1
a<1
当01-x>a-x
a<1
实数a的范围是a<1
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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