数列与不等式已知数列{an}是等差数列an=-2n+24,数列bn满足an=2log以a为底数,真数是bn,求使得bn>
数列与不等式已知数列{an}是等差数列an=-2n+24,数列bn满足an=2log以a为底数,真数是bn,求使得bn>
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
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
已知数列{an},如果数列{bn}满足b1=a1,bn=an+a(n-1)则称数列{bn}是数列{an}的生成数列
已知数列an满足a1=2 其前n项和为Sn Sn =n+7~3an 数列bn满足 bn=an~1 证明数列bn是等差数列
已知数列{bn}的前n项和为Tn=an^2+bn+c(a不等于0).判断数列Bn是否是等差数列
已知数列{bn}的前n项和为Tn=an^2+bn+c(a不等于0).判断数列Bn是否是等差数列,并说明理由
已知数列{bn}的前n项和为Tn=an^2+bn+c(a不等于0).判断数列Bn是否是等差数列,并说明理由.
已知数列{an}满足a1+a/4,(1-an)a(n+1)=1/4,令bn+an-1/2 求证数列{1/bn}为等差数列
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