题目

 Is there _________ in today’s newspaper?             A. something important                B. anything important             C. important something                D. important anything 答案:B已知函数f(x)=ax+bxex(a>0),g(x)=[a(x-1)]ex-f(x).(1)当a=1时?x∈(0,+∞)都有g(x)≥1成立,求b的最大值;  (2)当?x>1,使g(x)+g′(x)=0成立,求ba的取值范围.
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