有關1anan的精選大全

在正項等比數列{an}中,已知a1a2a3=4,a4a5a6=12,an-1anan+1=324,則n等於( ...
問題詳情:在正項等比數列{an}中,已知a1a2a3=4,a4a5a6=12,an-1anan+1=324,則n等於()A.12                                        B.13C.14                      ...
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