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等比数列{an}中,8a2+a5=0,则=A.-10B.10C.20D.21
试题详情
等比数列{a
n}中,8a
2+a
5=0,则
=( )
A.-10
B.10
C.20
D.21
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等比数列{an}中,8a2+a5=0,则=( )
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