已知等差数列{an},{bn}满足an/bn=2n/(3n+5),它们的前几项之和分别记为Sn和Tn,求S11/T11的值(要过程)
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已知数列{an},{bn}满足a1=2,2an=1+2an*an+1,设{bn}=an-1求数列{1n}为等差数列急!!!
已知数列{an}和{bn}满足关系:bn=(a1+a2+a3+…+an)/n,(n∈N*).若{bn}是等差数列,求证{an}为等差数列
已知数列{an}的前n项和sn满足sn=an^2+bn,求证{an}是等差数列
已知数列an满足a1=4,an=4 - 4/an-1 (n>1),记bn= 1 / an-2 .(1)求证:数列bn是等差数列
已知数列{an}{bn}满足,对任意n属于正整数,an,bn,an+1成等差数列,且an+1=根号下bnbn+1 1.证明:根号bn是等差已知数列{an}{bn}满足,对任意n属于正整数,an,bn,an+1成等差数列,且an+1=根号下bnbn+11.证明:根号bn
已知数列{an}{bn}满足,对任意n属于正整数,an,bn,an+1成等差数列,且an+1=根号下bnbn+1 1.证明:根号bn是等差已知数列{an}{bn}满足,对任意n属于正整数,an,bn,an+1成等差数列,且an+1=根号下bnbn+11.证明:根号bn
正整数列{an},{bn}满足对任意正整数n,an、bn、an+1成等差数列,bn、an+1、bn+1成等比数列,证明:数列{根号bn}成等差数列
已知等差数列{an}满足a2=3,a5=9,若数列{bn}满足b1=3,bn-1=a下标bn则bn为?
已知{an},{bn}满足an=㏒abn(A>0且a不等于1),求证,若{an}是等差数列,则{bn}是等比数列
已知等比数列{bn}是公比为q与数列{an}满足bn=3^an,(1)证明数列{an}是等差数列 (2)若b8=3,且数列{an}...已知等比数列{bn}是公比为q与数列{an}满足bn=3^an,(1)证明数列{an}是等差数列 (2)若b8=3,且数列{an}的
已知等差数列{an},a6=5,a3+a8=5.若数列{an}满足bn=a(2n-1),则{bn}的通项公式bn=?
已知公差不为0的等差数列{an}满足a2=3,a1,a3,a7成等比数列 (1)求an的通项公式已知公差不为0的等差数列{an}满足a2=3,a1,a3,a7成等比数列(1)求an的通项公式数列{bn}满足bn=an/an+1+an+1/an,求数列bn前n
已知数列{an}是等差数列,且bn=an+a(n-1),求证bn也是等差数列
数列{an}为等差数列,数列{bn}满足bn=2an+1+a2n-1,证明{bn}为等差数列
已知数列an满足a1=4 an=4-4/an-1(n大于等于2) 求证bn是等差数列 求数列an的通项公式
已知数列an满足a1=4 an=4-4/an-1(n大于等于2) 求证bn是等差数列 求数列an的通项公式
(1)若两等差数列{an},{bn}的前n项和分别为An,Bn,满足An/Bn=(7n+1)/(4n+27),则a11/b11的值为( )(2)已知等比数列{an},首项为81,数列{bn}满足bn=log3(an),其前n项和为Sn.①证明{bn}为等差数列;
已知正项数列{an}{bn}满足,对任意正整数n,都有an,bn,an+1成等差数列,bn,an+1,bn+1成等比数列且a1=10,a2=15求证:数列(根号Bn)是等差数列求数列{an},{bn}通项公式设Sn=1/(a1)+1/(a2)+1/(a3)+.1/(an)如果对任