Sn是等差数列前n项和,已知S6=36,Sn=324,Sn-6=144,则n的值为?这题运算量忒大,有没有简便的?没有把步骤详细写出来.忘了
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/09 17:10:08
x͑N@_#ŲۺЅx!(!ĄB@mmoN&oULL=X7KF?н`oPh66e(LSw-4j]a1ÎI
a_b$_4](<ϧ{>Ŧ !ur
Z7+H`٨## !JX"8˭% zxȻYUiHI9#:D4]rq
Vcb7- fM'ҵY]fe놼buU2v
已知等差数列前n项和为Sn,S6/S3=3 求S9除S6
设Sn是等差数列{an}的前n项和,已知S6=36,Sn=324,Sn-6=144(n>6),则n等于?
已知Sn是等差数列An的前n项和,6,已知S6=36,Sn=360,Sn-6=21,求项数n 求详细解题过程,谢谢,急求!已知Sn是等差数列An的前n项和,已知S6=36,Sn=360,Sn-6=216,求项数n 不好意思写错了,真的不好意思
等差数列{an}的前n项和记为Sn,已知S6=36,Sn=324,Sn-6=144(n>6),则n等于?
等差数列{an}中,Sn是{an}前n项和,已知S6=2,S9=5,则S15=
等差数列{an}中,Sn是{an}前n项和,已知S6=2,S9=5,则S15=
已知等差数列{An}的前n项和为Sn,A3=5,S6=36 求An
设Sn是等差数列an的前n项和,若S3/S6=1/3,则S6/S7=?
Sn是等差数列an前n项和,若S3/S6=1/3,则S6/S12=?
设Sn是等差数列(An)的前n项和,若S3/S6=1/3,求S6/S12=?
设Sn是等差数列{An}的前n项和,若S3/S6=1/3,则S6/S12=?
设Sn是等差数列的前n项和,S3:S6=1:3,则S6:S9=
设Sn是等差数列{an}的前n项和,若S3/S6=1/3,则S6/S12=?
设Sn是等差数列An的前n项和,若S3/S6=1/3,则S6/S12等于
设Sn是等差数列{an}的前n项和,若S3/S6=1/3,求S6/S12
sn是等差数列{an}前n项和,若s3/s6=1/3,求s6/s12
1.设Sn是等差数列【An]的前n项和,若S3/S6=1/3,求S6/S12
设Sn是等差数列{an}的前n项和,若S3/S6=1/4,则S6/S12等于?