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设sn为等比数列{an}的前n项和,8a2+a5=0,则=A.-11B.-8C.5D.11
试题详情
设s
n为等比数列{a
n}的前n项和,8a
2+a
5=0,则
=( )
A.-11
B.-8
C.5
D.11
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