You look so tired. You______have stayed up late again.
A.should
B.can
C.may
D.must
答案:D
设函数f(x)=x|x-1|+m(m∈R),g(x)=lnx.
(1)记h(x)=f(x)+g(x),求函数h(x)的单调增区间;
(2)若∀x∈[1,+∞),方程f(x)>g(x)恒成立,求m的取值范围.
进入密闭空间的作业要求?