若数列{An},{Bn}都是等差数列,s,t为已知实数,求证{an^t*bn^t}也是等差数列
若数列{an},{bn}都是等差数列,s,t 为已知常数,求证数列{ s an+t bn}是等差数列
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
若已知数列{an}是首项为6-12t,公差为6的等差数列;数列{bn}的前n项和为Sn=3n-t.
设数列an,bn满足:bn=(a1+a2+a3+a4+...+an)/n,若bn是等差数列,求证an也是等差数列
数列(an)和数列(bn)是等差数列,求证数列(an+bn)也是等差数列 (详细过程)
若数列{an}是首项为6-12t,公差为6的等差数列:数列{bn}的前n项和为Sn=3^n-t
已知数列an是等差数列,且bn=an+a(n+1).求证数列bn是等差数列.
已知数列{An}是等差数列,且Bn=An+A(n+1).求证数列{Bn}是等差数列
已知数列{An}及数列{Bn}都为等差数列,Cn=An+Bn,证数列{Cn}为等差数列
已知{an}是等差数列,bn=kan+m(k,m为常数).求证{bn}是等差数列
已知数列an是等差数列 且bn=2^a{n}求证bn为等比数列 {}里为下标 ^为上标
已知等比数列{an},首项为81,数列{bn}满足bn=㏒3an,其前n项和为Sn,求证﹛bn﹜为等差数列.