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在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,,,…,...
试题详情
在等差数列{a
n}中,公差d≠0,a
2是a
1与a
4的等比中项,已知数列a
1,a
3,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABcAAAAgCAYAAAD5VeO1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAPtJREFU
SEvtlNERAyEIREnLtmMn1mEVNkFYNacYk8GY+5O5+9GZByyLD5aguwLwu4LuAmdFDnymgJIleoJz
5Pcco2fycUu1Ck8cnEAvWGQvSTbZZaC5YkVCMschbRUu8BTYQYaegzMXeJPNlIJjp0osEumz3zog
LUnRmgiSJJavBQaMu4WOqiydS0SglmCoWBKsdLS0oehyxUELcHRUBt/24fts7HA4qJYd/eCuD/M2
w+EqsFekMcLrBmcn2XW3wbulQuVWx9jgvQXh9+x16Sboh21MbIJrned7gJlAsr4rE9y6/ONTcuBZ
uSPLm4FeVuzt+Fe3jBkPfLrET6LsnKstN0jBAAAAAElFTkSuQmCC
)
,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABcAAAAgCAYAAAD5VeO1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAASZJREFU
SEvtll0SwyAIhOmVvQ434RycwktQUBM1/YPGPHSmTvuSdj5h2dXcRBdctQx+1YKrwEWRP/yZApMs
jGDO0S8KMwogn1KtwbNQUugOY0Hd5CS7DrRUPJFssySUTxWu8EySTIaRY88SyUm2QKYkaSqxSjQ/
+64DmCWpWgOYJFn005cN2H4LdNRkGVyiAvUNDhXrBpGOQgm1LiMOCsCtozr4nof3s/HDzUGtbMaD
u17M2w03Vxk7Io0T3hJcnOTX3QcfQmWVex3jg48WNL8Xr2s3tOV67KzPwwWfdX7MQSbcz6HipBY0
FzwU/uGsWg8vCa/SrIdr5dgOwuVwpn5UL4VvQdtmtAw+3wusNs1rNB8PsnrB1ytyWeUfXy1Cfnb8
+XcrvwPhP5KfCLrvKwAAAABJRU5ErkJggg==
)
,…,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAAgCAYAAAAMq2gFAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATBJREFU
SEvtllESwiAMROOVuQ434RycgkvELKBArW2MmX6V0RmnVp67bJI+WBZdsQC6YtEVkOraDbI6sFiX
IyGB8o6cc2SK2brvx+86qHAKAnhvnDkK0JHTwlCVLLsCHDgVN0ECKokDrJr3xLWQ2JHDVFLgsPz1
ZuN67X9ltNrWzoYIthWW11gIB74zKu3WTWkTEwdso0RgVqU/dQaotybxBxCUttCMetOfpR6EJHY5
OW5SqsiKGoR0gmO1TwnqnaMm0nZOOtBUwFBkSZ4ONMca9VRrSVQmfdNVgdZzOaizg1CoQIpQnd7i
BOoqq6Xz58H3AaEv1nPM0pClxnYmgg+od4sgkDoIdqazEwh2oaBbu98rah/QrGBvkHo91y0KXnNr
0+Z9FJ2G+35SVVj07ZYnMtYEgpG4ZpAAAAAASUVORK5CYII=
)
,…成等比数列,求数列{k
n}的通项k
n.
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