逆命題:若數(shù)列是“M類數(shù)列 .則數(shù)列也是“M類數(shù)列 . 查看更多

 

題目列表(包括答案和解析)

對(duì)于給定數(shù)列{cn},如果存在實(shí)常數(shù)p,q使得cn+1=pcn+q對(duì)于任意n∈NN*都成立,我們稱數(shù)列{cn}是“M類數(shù)列”.

(1)若an=2n,bn=3·2n,n∈N*,數(shù)列{an}、{bn}是否為“M類數(shù)列”?若是,指出它對(duì)應(yīng)的實(shí)常數(shù)p,q,若不是,請(qǐng)說(shuō)明理由;

(2)證明:若數(shù)列{an}是“M類數(shù)列”,則數(shù)列{an+an+1}也是“M類數(shù)列”;

(3)若數(shù)列{an}滿足a1=2,an+an+1=3t·2n(n∈N*),t為常數(shù).求數(shù)列{an}前2009項(xiàng)的和.并判斷{an}是否為“M類數(shù)列”,說(shuō)明理由;

(4)根據(jù)對(duì)(2)(3)問(wèn)題的研究,對(duì)數(shù)列{an}的相鄰兩項(xiàng)an、an+1,提出一個(gè)條件或結(jié)論與“M類數(shù)列”概念相關(guān)的真命題,并探究其逆命題的真假.

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對(duì)于給定數(shù)列{cn},如果存在實(shí)常數(shù)p,q使得cn+1=pcn+q對(duì)于任意n∈N*都成立,我們稱數(shù)列{cn}是“M類數(shù)列”.
(1)若an=2n,bn=3•2n,n∈N*,數(shù)列{an}、{bn}是否為“M類數(shù)列”?若是,指出它對(duì)應(yīng)的實(shí)常數(shù)p,q,若不是,請(qǐng)說(shuō)明理由;
(2)證明:若數(shù)列{an}是“M類數(shù)列”,則數(shù)列{an+an+1}也是“M類數(shù)列”;
(3)若數(shù)列{an}滿足a1=2,an+an+1=3t•2n(n∈N*),t為常數(shù).求數(shù)列{an}前2009項(xiàng)的和.并判斷{an}是否為“M類數(shù)列”,說(shuō)明理由;
(4)根據(jù)對(duì)(2)(3)問(wèn)題的研究,對(duì)數(shù)列{an}的相鄰兩項(xiàng)an、an+1,提出一個(gè)條件或結(jié)論與“M類數(shù)列”概念相關(guān)的真命題,并探究其逆命題的真假.

查看答案和解析>>

對(duì)于給定數(shù)列{cn},如果存在實(shí)常數(shù)p,q使得cn+1=pcn+q對(duì)于任意n∈N*都成立,我們稱數(shù)列{cn}是“M類數(shù)列”.
(1)若an=2n,bn=3•2n,n∈N*,數(shù)列{an}、{bn}是否為“M類數(shù)列”?若是,指出它對(duì)應(yīng)的實(shí)常數(shù)p,q,若不是,請(qǐng)說(shuō)明理由;
(2)證明:若數(shù)列{an}是“M類數(shù)列”,則數(shù)列{an+an+1}也是“M類數(shù)列”;
(3)若數(shù)列{an}滿足a1=2,an+an+1=3t•2n(n∈N*),t為常數(shù).求數(shù)列{an}前2009項(xiàng)的和.并判斷{an}是否為“M類數(shù)列”,說(shuō)明理由;
(4)根據(jù)對(duì)(2)(3)問(wèn)題的研究,對(duì)數(shù)列{an}的相鄰兩項(xiàng)an、an+1,提出一個(gè)條件或結(jié)論與“M類數(shù)列”概念相關(guān)的真命題,并探究其逆命題的真假.

查看答案和解析>>

對(duì)于給定數(shù)列{cn},如果存在實(shí)常數(shù)p,q使得cn+1=pcn+q對(duì)于任意n∈N*都成立,我們稱數(shù)列{cn}是“M類數(shù)列”.
(1)若an=2n,bn=3•2n,n∈N*,數(shù)列{an}、{bn}是否為“M類數(shù)列”?若是,指出它對(duì)應(yīng)的實(shí)常數(shù)p,q,若不是,請(qǐng)說(shuō)明理由;
(2)證明:若數(shù)列{an}是“M類數(shù)列”,則數(shù)列{an+an+1}也是“M類數(shù)列”;
(3)若數(shù)列{an}滿足a1=2,an+an+1=3t•2n(n∈N*),t為常數(shù).求數(shù)列{an}前2009項(xiàng)的和.并判斷{an}是否為“M類數(shù)列”,說(shuō)明理由;
(4)根據(jù)對(duì)(2)(3)問(wèn)題的研究,對(duì)數(shù)列{an}的相鄰兩項(xiàng)an、an+1,提出一個(gè)條件或結(jié)論與“M類數(shù)列”概念相關(guān)的真命題,并探究其逆命題的真假.

查看答案和解析>>

對(duì)于給定數(shù)列{cn},如果存在實(shí)常數(shù)p,q使得cn+1=pcn+q對(duì)于任意n∈N*都成立,我們稱數(shù)列{cn}是“M類數(shù)列”.
(1)若an=2n,bn=3•2n,n∈N*,數(shù)列{an}、{bn}是否為“M類數(shù)列”?若是,指出它對(duì)應(yīng)的實(shí)常數(shù)p,q,若不是,請(qǐng)說(shuō)明理由;
(2)證明:若數(shù)列{an}是“M類數(shù)列”,則數(shù)列{an+an+1}也是“M類數(shù)列”;
(3)若數(shù)列{an}滿足a1=2,an+an+1=3t•2n(n∈N*),t為常數(shù).求數(shù)列{an}前2009項(xiàng)的和.并判斷{an}是否為“M類數(shù)列”,說(shuō)明理由;
(4)根據(jù)對(duì)(2)(3)問(wèn)題的研究,對(duì)數(shù)列{an}的相鄰兩項(xiàng)an、an+1,提出一個(gè)條件或結(jié)論與“M類數(shù)列”概念相關(guān)的真命題,并探究其逆命題的真假.

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