设等差数列{an}的前n项和Sn,且S4/S8=1/3,则S8/S16=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/31 09:57:15
x){nO{6uӎՉyg<{pI=y:OvL 657y13B?&H"v6 Y^ٺ@/x6c=Mt-tAn22uuLPtd!r[cF[#V D X9ԁ6yv n
设等差数列An的前n项和为Sn,且S4=4S2,A2n=2An+1
设等差数列{an}的前n项和Sn,且S4/S8=1/3,则S8/S16=?
设等差数列{an}的前n项和为Sn,且S4=20,S8=72,则S12=?
设等差数列an的前n项和为Sn,若S4>=10,S5
设等差数列{an}的前n项和为Sn,a1=3/2,且S1,S2,S4成等差数列,求Sn
设等差数列an的前n项和为Sn,a1=3/2,且s1,s2,s4成等比数列,求sn
设等差数列〔an〕的前n项和为Sn,a1=3/2,且S1,S2,S4成等比数列,求Sn.
设等差数列{an}的前n项和为Sn,且S4=-62,S6=-75求{an}的通向公式an及前n项和Sn,求出前n项和的最小值
设数列(An)是等差数列,且a2=-6,a8=6,Sn是数列(An)的前n项和,求S4,S5,S6.
设{an}是等差数列前n项和为Sn,若S4>=10,S5
设Sn是公差不为0的等差数列An的前N项和,且S1.S2.S4.成等比数列.则A2%A1等于?
设数列{an}为等差数列,其前n项和为Sn,且S4=-62,S6=-75求|a1|+|a2|+……+|a14|的值
设数列{an}为等差数列,其前n项和为Sn,且S4=-62,S6=-75求|a1|+|a2|+……+|a14|的值
设Sn是公差不为0的等差数列an地前n项和且S1,S2,S4成等比数列,则a1/a2等于
设Sn为等差数列{an}的前n项和,S4=14,S20-S8=30,则S8=设Sn为等差数列{an}的前n项和,S4=14,S20-S7=30,则S8=
数列推导设等差数列An的前n项和为Sn,则S4,S8-S4,S12-S8,S16-S12成等差数列,设等差数列An的前n项和为Sn,则S4,S8-S4,S12-S8,S16-S12成等差数列,类比以上结论有:设等比数列Bn的前n项积为Tn,则T4,T8/T4,T12/T8,T16/T
设Sn为等差数列an的前n项和,S4=14,S10-S7=30,则S9=
设sn为等差数列(an)的前n项和,s4=14,s10-s7=30.则s9...