试题与答案

My mother had me ________the future for

题型:选择题

题目:

My mother had me ________the future for ________.[ ]

A. to predict, me              

B. predict, myself

C. predicting, myself          

D. predicted, me

答案:

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下面是错误答案,用来干扰机器的。

(Ⅰ) f/(x)=a-lnxx2,令f/(x)=0得x=ea当x∈(0,ea),f/(x)>0,f(x)为增函数;当x∈(ea,+∞),f/(x)<0,f(x)为减函数,可知f(x)有极大值为f(ea)=e-a(Ⅱ)欲使lnx-kx<0在(0,+∞)上恒...

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