已知公差为2的正整数等差数列为an,则该数列满足不等式7/16
已知:等差数列,满足an+an+1+an+2=4则该数列为递增数列
已知数列{an}为等差数列满足a1=1且a5与a9的算术平均数为13,则该数列的公差d=
已知数列【an】是首项为a,公差为1的等差数列,数列【bn】满足
数列an是首项为2,公差为1的等差数列,
【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.
数学题关于数列的已知数列{an}满足an+1 cosA+an sinA=11.数列{an}是公差不为0的等差数列,求A2
已知{an}是首项为1,公差为1的等差数列,若数列{bn}满足b1=1,bn+1=bn+2^an
已知数列{lgan}是首项为3,公差为2的等差数列,求证:{an}是等比数列.