67.What information can you get from the text? A.The program will last two months. B.You can write to Thompson only in English. C.As a Chinese student, you can send your application on July 14, 2007. D.You can get in touch with the school by e-mail or by telephone. B Odiand remembers like it was yesterday working in an expensive French restaurant in Denver.The ice cream he was serving fell onto the white dress of a rich and important woman. .Thirty years have passed, but Odiand can' t get the memory out of his mind, nor the woman' s kind reaction.She was shocked, regained calmness and, in a kind voice, told the young Odiand, “It' s OK.It wasn' t your fault." When she left the restaurant, she also left the future Fortune 500 CEO with a life lesson: You can tell a lot about a person by the way he or she treats the waiter. Watch out for anyone who pulls out the power card to say something like, " I could buy this place and fire you," or "I know the owner and I could have you fired." Those who say such things have shown more about their character than about their wealth and power. The CEO who came up with it, or at least first wrote it down, is Raytheon CEO Bill Swanson.He wrote a best-selling book called Swanson' s Unwritten Rules of Management. "A person who is nice to you but rude to the waiter, or to others, is not a nice person," Swan-son says." I will never offer a job to the person who is sweet to the boss but turns rude to someone cleaning the tables." 【查看更多】

 

题目列表(包括答案和解析)

在数列{an}中,an+1=can(c为非零常数)且前n项和Sn=3n+k,则k等于(  )

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13、设数列{an}满足a1=a,an+1-1=can-c,n∈N*,其中a、c为实数,且c≠0则an=
an=( a-1)cn-1+1 (n∈N*)
.

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等差数列a1,a2,a3,…,an的公差为d,则数列ca1,ca2,ca3,…,can(c为常数,且c≠0)是(  )

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(2011•天津模拟)设数列{an}满足a1=a,an+1=can+1-c(n∈N*),其中a,c为实数,且c≠0.
(1)求证:a≠1时数列{an-1}是等比数列,并求an;
(2)设a=
1
2
c=
1
2
,bn=n(1-an)(n∈N*)
,求数列{bn}的前n项和Sn;
(3)设a=
3
4
,c=-
1
4
,cn=
3+an
2-an
(n∈N*),记dn=c2n-c2n-1(n∈N*)
,设数列{dn}的前n项和为Tn,求证:对任意正整数n都有Tn<
5
3
.

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设数列{an}满足a1=a,an+1=can+1-c(n∈N*),其中a,c为实数,且c≠0.
(Ⅰ)求数列{an}的通项公式;
(Ⅱ)设a=
1
2
,c=
1
2
,bn=n(1-an)(n∈N*)
,求数列{bn}的前n项和Sn.

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