已知数列{an}是首项为1,公差为2的等差数列.且bn=2的an次方(n属于N+)
已知数列{an}是首项为1,公差为2的等差数列.且bn=2的an次方(n属于N+)
已知等差数列a1=3/2,公差为1,设bn=a*2的n次方+b*an-75(a,b属于自然数),且数列{bn}的前项和T
【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
29(14):已知数列{an}是首项a1=m,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
1.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.
设数列an前n项和Sn已知a1=a2=1 bn=nSn+(n+2)an数列bn公差为d的等差数列n属于N...
已知数列{an}的前N项和为An,等差数列{bn}的首项为9,公差为-2,前n项和为Bn,且满足bn=An/n+4
已知数列{an}的前n项和Sn=n(bn),其中{bn}是首项为1,公差为2的等差数列
已知数列{an}是公差为d的等差数列,d≠0且a1=0,bn=2^(an)(n属于N*),Sn是{bn}的前n项和,Tn
已知数列{An}与{Bn}都是公差不为零的等差数列,且limAn/Bn=2,求lim(A1+A2+……+An)/(n*B