等差数列{an}的前n项和为sn,且s3=6,a1=4,则公差d等于多少
等差数列{an}的前n项和为Sn,且S3=6,a1=4,则公差d等于
等差数列{an}的前n项和为sn,且s3=6,a1=4,则公差d等于多少
等差数列{an}的前n项和为sn,且S3=6,a1=4,则公差d等于______.
(2014•齐齐哈尔三模)等差数列{an}的前n项和为Sn,且S3=6,a1=4,则公差d等于( )
已知等差数列{an}的公差d不等于0,其前n项和为sn,且a1,a3,a9成等比数列,则s3/s7=多少
等差数列{an}前n项和sn且s3=6,a3=4,则公差d等于
设等差数列{an}的首项及公差均是正整数,前n项和为sn,且a1>1,a4>6,s3≤12,则a2013=?
已知等差数列{an}的前n项和为Sn,公差d≠0,且S3=9,a1,a3,a7成等比数列.
已知等差数列{an}的前n项和为Sn,公差d≠0,且S3+S5=50,a1,a4,a13成等比数列.
等差数列(an)的前项n项和为Sn且S3=6,a3=4,则公差d=多少?
已知等差数列{an}前n项和为Sn,公差d≠0,且S3+S5=50,a1,a4,a13,成等比数列,求{an}通项公式.
已知公差不为0的等差数列{an}的前n项和为Sn,S3=a4+6,且a1,a4,a13成等比数列.