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等比數列{an}中,a4=4,則等於                                     ...

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問題詳情:

等比數列{an}中,a4=4,則等比數列{an}中,a4=4,則等於                                     ...等於                                                                  

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

【回答】

C 

知識點:數列

題型:選擇題