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已知等比数列中:,则的值为 A. B.-8 C.8 D.64

已知等比数列6ec8aac122bd4f6e中:6ec8aac122bd4f6e,则6ec8aac122bd4f6e的值为

A.6ec8aac122bd4f6e              B.-8              C.8                D.64

 

A 【解析】∵在等比数列{an}中,
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