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已知数列{an}中,a1=1,,且,{bn}为等比数列.(Ⅰ)求实数λ及数列{an},{b...
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已知数列{a
n}中,a
1=1,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAM0AAAAjCAYAAAA38o6bAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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)
,且
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEEAAAAqCAYAAADsxDbcAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAntJREFU
aEPtmNuRwyAMRdmW3Q6dUAdV0AQrIWRjILHsBJmZ2D+bmcUPHe7Vg78Il/n1CyH8+mV+HUBywgPh
gZA08ChhLgg+WmOgUi3ReRcXY6NX8uocSggYNAQfMOoQ3QIwrBaCKexAQZcxe2viQkRUrvuV4G21
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WZqOAeTeIeWI8vfxnc2KVIZBZZ18s1MCelKxPB9HEkIMYJfFeagY0DylQK41Ud7Sfb0YCwhYmq69
4Dia6ytSzwDfldqGppx2ngtr3m4kgLRVD7JBQMofyICTm/SvDAtaANVJBbMup91nHEFAW1WWWCGQ
TLh/73tH9uFfXFXuvNQKEgiVpTKE3K+v/yQYHwjjKyR2O8+ltPNRa1LPpXavxr3FqRfZd6QEobFC
288fRSW1Aa87et7l/79VQo4LkmTZkCUIbcYkLyrOMJdjbm58ByGpKVeZQlEAoa0KSTJ3e+EqlpcQ
SAWkAPhtt/nE1FYgz8xXKsVMXkFIKtjU7S39Ds7RFLlLLMoKOJtL6vUyOJ2DGu4gId5ndgCKDwQ5
BG6icq7INVt77pdJ//yqE0rI7SZ3cZI+/vz33HKHHEKa5mD4yIlT+zB0JB0xBKogXDr1D0MngFB1
kFhevn4Yug1vJDaeZ8bPMDIlVEFjQzUmKSIIVNumtHHv2rQlglB/yLDD0Azb5W6O1TC6fxNBGOnH
8tl85L4GPcR2bTQTQWjHdw0rIJJ5IDS7znkBDlkHz/TTQGh2nQcchYl2Gghaeaf3ngfCVDnhRik8
SgD4/5IB4fncBbNOAAAAAElFTkSuQmCC
)
,{b
n}为等比数列.
(Ⅰ)求实数λ及数列{a
n},{b
n}的通项公式;
(Ⅱ)若S
n是数列{a
n}的前n项和,求S
n.
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