等差数列{an}的首项为a,公差为1,数列{bn}满足bn=(an)/((an)+1),若对任意n∈N*,都有bn>=b

等差数列{an}的首项为a,公差为1,数列{bn}满足bn=(an)/((an)+1),若对任意n∈N*,都有bn>=b 已知{an}首项为a1,公差为1的等差数列bn=(1+an)/an,若对任意的n属于N,都有bn>=b8, 已知正项数列{an},{bn}满足:对任意正整数n,都有an,bn,a(n+1)成等差数列,bn,a(n+1),b（n＋ 已知AN是公差为1的等差数列,BN=(1+AN)/AN 若对任意的N都有BN {a} 、{b} 都是各项为正的数列,对任意的正整数n,都有an,bn^2,an+1 成等差数列,bn^2,an+1,b 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 关于数列和 不等式.1.若两等差数列｛an｝｛bn｝的前n项和为 An Bn ,满足(An/Bn)=(7n+1)/4n+ 有两个正数数列an,bn,对任意正整数n,有an,bn,an+1成等比数列,bn,an+1,bn+1成等差数列,若a1= 已知正项数列{an},{bn}满足：a1=3,a2=6,{bn}是等差数列,且对任意正整数n,都有bn,根号an,bn+ 【紧急--高一数学】已知数列{an}是首项a1=a,公差为2的等差数列;数列{bn}满足2bn=(n+1)an （高二数学）已知数列{an}是首项a1=a,公差为2的等差数列;数列{bn}满足2bn=(n+1)an 已知数列{an}是首项a1=a,公差为2的等差数列,数列{bn}满足2bn=（n+1）an