等比数列{an}中,a4=4,则等于                                     ...

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等比数列{an}中,a4=4,则等比数列{an}中,a4=4,则等于                                     ...等于                                                                  

A.4                            B.8                            C.16                          D.32

【回答】

C 

知识点:数列

题型:选择题

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