已知函数f(x)=mx-m-1x-lnx(m∈R),g(x)=1x+lnx.(I

题型:解答题

问题:

已知函数f(x)=mx-
m-1
x
-lnx(m∈R),g(x)=
1
x
+lnx

(I)求g(x)的极小值;
(II)若y=f(x)-g(x)在[1,+∞)上为单调增函数,求m的取值范围;
(III)设h(x)=
2e
x
,若在[1,e]
(e是自然对数的底数)上至少存在一个x0,使得f(x0)-g(x0)>h(x0)成立,求m的取值范围.
考点:函数的单调性与导数的关系函数的极值与导数的关系
题型:解答题

Tiangong -- 1(or.Heavenly Palace)space module(舱)is the first step toward China’s plan to build a space station around 2020.Its launch(发射)by China has upset some countries,which are asking why China did not add on to the International Space Station that has been in place since 1998. After all, the Americans,Russians,Europeans and Japanese are using one platform to experiment in space.

Questions have also been asked about China’s final purpose in space and suggestions made that there is something as unpleasant as the theme in a James Bond movie,in which Chinese-looking enemies were at the root of some evil(邪恶的)plot to control the world.

Chinese don’t see themselves that way, and never in history have they been flag-planting settlers.Most Westerners are educated in the adventures of the great European explorers,headed by Christopher Columbus and James Cook,and followed closely by the groups of culture egotists(自大者)with a mix of guns,gold and the Bible in their hands.

In comparison,Zheng He,the great Chinese sailing master,took groups of ships to Africa and the Middle East to promote goodwill, with gifts of chinaware and art.No flags claiming(宣称) possession of distant areas.But this is strange to Western society.

In this century,it is clear that space cannot be claimed by one nation.Yet advantage of technology in space does seem to be on some minds.Former US president Ronald Reagan caused shocks and worries with his Star Wars program.So when China shot down its own satellite as a test in January 2010 there were anxieties in the West about Star Wars 1ike scenario(剧本)becoming reality in the near future.

小题1:The launch of Tiangong -- 1 __________.

A.is appreciated by countries like the USA and Japan

B.will bring trouble to the western countries in space

C.is part of China’s plan to set up a station in space

D.will help China be a member of the Space Station小题2:It is most probable that the US,Russia,Europe and Japan ______­­­­__.

A.are competing against one another in space wars

B.feel anxious about China’s setting up a space station

C.are cooperating to compete against China in space

D.have warned the world of China’s final purpose小题3:The author of the passage mentions Zheng He _________.

A.to tell people China’s will never be enemies of world peace

B.to compare him to the great European explorers like Columbus

C.to indicate that he is the pride of the Chinese people

D.to show that the Chinese people are as great as other peoples小题4:From the last paragraph,we can infer that _________.

A.China’s shooting down its satellite made the scenario become reality

B.some countries are trying to be ahead of the others in space exploration

C.China will be in control of the world if she starts space exploration

D.if a nation has a better technology in space,it will start a star war

题型:解答题

假设主频为66MHz的Pentium微处理器以非流水线方式访问存取时间为60ns的DRAM存储器,则在T1周期与T2周期之间至少应插入( )等待状态。

A.1个

B.2个

C.4个

D.6个

题型:解答题

我国北方沿海航线和南方沿海航线一般以哪里为界?[ ]

A.浙江温州

B.福建福州

C.福建厦门

D.广东汕头

题型:解答题

全国人民代表大会每届任期( )年。

A.2

B.3

C.5

D.10

题型:解答题

矿井通风皀作用是什么?

更多题库