已知函数f(x)=xlnx,(x>0,且x≠1)(Ⅰ)求函数r(x)=1f(x)

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问题:

已知函数f(x)=xlnx,(x>0,且x≠1)
(Ⅰ)求函数r(x)=
1
f(x)
的单调区间;
(Ⅱ)若对任意的n∈N+,都有an>0,且a1+a2+…+a2013=2013e(e为自然对数的底),求f(a1)+f(a2)+…+f(a2013)的最小值.
考点:函数的单调性与导数的关系数列求和的其他方法(倒序相加,错位相减,裂项相加等)
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A.硬件部分

B.软件部分

C.具体连接部分

D.文档资料部分

题型:解答题
情景交际:从方框中选择出合适的选项完成对话。
A: Hi, Tom. We have a new English teacher this year. It's Miss Black.
B: Really?
A: Yes. 1______
B: ls English your favorite subject?
A: I like it very much. 2______
B: Why?
A: 3______
B: What's your favorite subject, then?
A: Music.
B: Why do you like music? I don't like it at all.
A: 4______
B: When do you have music?
A: 5______ But I want to have music every day. So I go to the music club on Sundays.
B: Oh, I think you are great !
A. But it's not my favorite subject.
B. Because I can play the piano and the violin in music class.
C. It's a little hard for me.
D. We have music only on Tuesday and Friday.
E. She's a very good teacher. We' all love her.
F. She's very beautiful. We all like her.
G. It's my favorite subject.
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A.祛邪扶正

B.燥湿化痰,理气止咳

C.清肺泻肝,顺气降逆

D.滋阴润肺,化痰止咳

E.清热肃肺,豁痰止咳

题型:解答题

卡特尔人格因素问卷将人格因素分为()

A.14个

B.16个

C.18个

D.12个

E.8个

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