1、已知数列{an}的前几项的和为sn ,且满足a1= ,an=-2snsn-1(n≥2)
1、已知数列{an}的前几项的和为sn ,且满足a1= ,an=-2snsn-1(n≥2)
已知数列{an}的前n项和为Sn,且满足a1=1,Sn-Sn-1=2SnSn-1(n≥2).
已知数列{an}的前n项和为Sn,且满足a1=12,an+2SnSn-1=0(n≥2).
已知数列{an}的前n项和为Sn,且满足a1=1/2,an=-SnSn-1(n>=2)
已知数列an的前n项和为Sn,且满足an+SnSn-1=0(n>=2,n∈N*),a1=1/2.
已知数列an的前n项和为sn且满足a1=1,sn-sn-1=2snsn-1拜托各位大神
已知数列{an}的前n项和为Sn,且满足a1=1/2,an+2SnSn-1=0(n>=2)
已知数列an的前n项和为Sn,且满足a1=1/2,An=-2SnSn-1 n>=2
已知数列{an}的前n项和为Sn.且满足a1=12,an=−2SnSn−1(n≥2)
已知数列{an}的前n项和为Sn,且满足an+2SnSn-1=0(n≥2),a1=1/2(1)判断{1/Sn},、{An
已知在数列{an}的前n项和Sn满足an+2SnSn-1=0(n大于2),a1=二分之一,求an
有一步看不懂已知数列{an}的前n项和为Sn,且满足a1=,an+2SnSn﹣1=0(n≥2).