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已知等比数列{an}为递增数列,且a3+a7=3,a2•a8=2,则=________.
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已知等比数列{a
n}为递增数列,且a
3+a
7=3,a
2•a
8=2,则
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAxCAYAAADa6ImIAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEVSURBVFhH7ZbRDcUgCEWZzJ1Yx2UYxVF4qDFR
C32V+tGk9aepsUe4oL3Amwds5vEHvK9opyExAjBA4EiRAyCTg1+BKQMElMoLxyBg9OA4V7kC+u8J
gUOlLw9gwimavEGLdpnHkKPpo0sxMIQocfvGACwwKcycriWBNl9TLtWtoLyoh1qbWPOXjl7+WCuS
Nv8B9VZ5toatPeb+tOYvVXnlzLwR2M7xjmfW+o0arvTYlbWfhk0lv4s4anjTRUzA+y5iBG5wEQNw
h4swgccfeStUNQLF9il+5Ziy5SKIBr9IqPtH50mR4qFuqHxAaS00/KMLmCKq+jkvWDtdJ1CqfeK/
11OW5j/z88tAq13atbIM/HdrPx/4Aw/kPWTXFAR5AAAAAElFTkSuQmCC
)
=________.
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已知等比数列{an}为递增数列,且a3+a7=3,a2•a8=2,则
=________.
-
已知等比数列{an}为递增数列,且a3+a7=3,a2•a8=2,则
=________.
-
已知等比数列{an}为递增数列,且a3+a7=3,a2•a8=2,则
=________.
-
已知等比数列{an}为递增数列,且a3+a7=3,a2•a8=2,则
=________.
-
已知等差数列{an}是递增数列,且满足a4•a7=15,a3+a8=8.
(1)求数列{an}的通项公式;
(2)令
,求数列{bn}的前n项和Sn.
-
已知等差数列{an}是递增数列,且满足a4•a7=15,a3+a8=8.
(1)求数列{an}的通项公式;
(2)令
,求数列{bn}的前n项和Sn.
-
已知等差数列{an}是递增数列,且满足a4•a7=15,a3+a8=8.
(1)求数列{an}的通项公式;
(2)令
,求数列{bn}的前n项和Sn.
-
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(1)求数列{an}的通项公式;
(2)令
,求数列{bn}的前n项和Sn.