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数列{an}的首项为1,前n项和是Sn,存在常数A,B使an+Sn=An+B对任意正整数n...
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数列{a
n}的首项为1,前n项和是S
n,存在常数A,B使a
n+S
n=An+B对任意正整数n都成立.
(1)设A=0,求证:数列{a
n}是等比数列;
(2)设数列{a
n}是等差数列,若p<q,且
,求p,q的值.
(3)设A>0,A≠1,且
对任意正整数n都成立,求M的取值范围.
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数列{an}的首项为1,前n项和是Sn,存在常数A,B使an+Sn=An+B对任意正整数n都成立.
(1)设A=0,求证:数列{an}是等比数列;
(2)设数列{an}是等差数列,若p<q,且,求p,q的值.
(3)设A>0,A≠1,且对任意正整数n都成立,求M的取值范围.
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数列{an}的首项为1,前n项和是Sn,存在常数A,B使an+Sn=An+B对任意正整数n都成立.
(1)设A=0,求证:数列{an}是等比数列;
(2)设数列{an}是等差数列,若p<q,且,求p,q的值.
(3)设A>0,A≠1,且对任意正整数n都成立,求M的取值范围.
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(2)设数列{an}是等差数列,若p<q,且,求p,q的值.
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数列{an}的前n项和为Sn,存在常数A,B,C,使得对任意正整数n都成立.
(1)若数列{an}为等差数列,求证:3A-B+C=0;
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