4.已知四個(gè)實(shí)數(shù)成等差數(shù)列.五個(gè)實(shí)數(shù)成等比數(shù)列.則的值等于 查看更多

 

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已知四個(gè)實(shí)數(shù)成等差數(shù)列,五個(gè)實(shí)數(shù)成等比數(shù)列,則的值等于                                       

A.                    B. 8               C.          D.

 

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已知四個(gè)實(shí)數(shù)成等差數(shù)列,五個(gè)實(shí)數(shù)成等比數(shù)列,

  則的值為....................................................................................................   (  )

A.                       B.                     C.                    D.

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已知四個(gè)實(shí)數(shù)成等差數(shù)列,五個(gè)實(shí)數(shù)成等比數(shù)列,則的值等于                                       

A.B.8C.D.

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已知四個(gè)實(shí)數(shù)成等差數(shù)列,五個(gè)實(shí)數(shù)成等比數(shù)列,則的值等于                                       
A.B.8C.D.

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已知四個(gè)實(shí)數(shù)成等差數(shù)列,-4,b1,b2,b3,-1五個(gè)實(shí)數(shù)成等比數(shù)列,則=  (    ) 

A. 1           B .2           C .-1          D .±1

 

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