设等差数列前n项和为Sn,且S4等于负62,S6等于负75,求通项公式和An前项和Sn快,帮帮忙,给个答案啊~

设等差数列前n项和为Sn,且S4等于负62,S6等于负75,求通项公式和An前项和Sn快,帮帮忙,给个答案啊~ 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项和为Sn,且S4=20,S8=72,则S12=? 已知等差数列{an}中的前n项和为Sn,且S4/S8=1/3,那么S8/S16等于? 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,若S4>=10,S5 设｛an｝是等差数列前n项和为Sn,若S4>=10,S5 若等差数列{an}的前n项和为Sn,且a2+a3=6,则S4的值为 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,若S4大于等于12,S7小于等于28,则a7的最大值为? 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=-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 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