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已知数列{an}满足,.(1)试判断数列是否为等比数列,并说明理由;(2)设,求数列{bn...
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已知数列{a
n}满足
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAjCAYAAADmOUiuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAFWSURBVFhH7VbREcMgCGUyd3Idl3EUR6GiNYbU
S7DYKx967fWaoDyf8HyAxgcYx4cboPiEUkAHDkPiM2wwGD0CQP5aBVhIi+g3QHHBjQI3gyr6dg1q
6TPOYBFp0sH69bHvd6lQtwSSXynlSwFKk87EMYDRN5o9Rrp+zlzPrLow9g0wYXCA7ripSTR5LSzM
ObVUAUjMdXD0hAB/XtxPK0tqr8W0te7mUAwgdZALGdJpjJ49ofvRe0jBDdi7Mvqj7IJlgR9vrb3q
yxLmz99HPeJDJHP3Fl82No81dr42H3d5GNac91Juch28cb2PAO4CaNOHnL3JOcmbHGBJMvZsGoAp
Rtag1BNnFv8O8GNzlwvCHEBqWoVZWH/EjEFWj/WNIQbp9iIV4cMMwOjH8mUCIHUuM065Udp/OcAb
16uRmW7xuqMG6EctB6hBoZi7ASrI+0ZmtOnm578AxLyx1rbwoD8AAAAASUVORK5CYII=
)
,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMQAAAA4CAYAAACi9lcJAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
.
(1)试判断数列
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAE0AAAAqCAYAAAD2+NZSAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
是否为等比数列,并说明理由;
(2)设
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADQAAAAxCAYAAACVtYpYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
,求数列{b
n}的前n项和S
n.
相关试题
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已知数列{an}满足
,
.
(1)试判断数列
是否为等比数列,并说明理由;
(2)设
,求数列{bn}的前n项和Sn.
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