6.已知-9.a1, a2,-1四個(gè)實(shí)數(shù)成等差數(shù)列,-9.b1, b2, b3,-1五個(gè)實(shí)數(shù)成等比數(shù)列. 則b2(a2-a1)等于 ( ) A.-8 B.8 C.- D. 查看更多

 

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已知-9,a1,a2,a3,-1五個(gè)實(shí)數(shù)成等比數(shù)列,-9,b1,b2,-1四個(gè)實(shí)數(shù)成等差數(shù)列,則a2(b1-b2)等于(    )

A.-                    B.8                  C.-8                     D.±8

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已知-9,a1,a2,-1四個(gè)實(shí)數(shù)成等差數(shù)列,-9,b1,b2,b3,-1五個(gè)實(shí)數(shù)成等比數(shù)列,則b2(a2-a1)=( 。
A、8
B、-8
C、±8
D、
9
8

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已知-9,a1,a2,-1四個(gè)實(shí)數(shù)成等差數(shù)列,-9,b1,b2,b3,-1五個(gè)實(shí)數(shù)成等比數(shù)列,則b2(a2-a1)的值等于
 

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已知-9,a1,a2,-1四個(gè)實(shí)數(shù)成等差數(shù)列,-9,b1,b2,b3,-1五個(gè)實(shí)數(shù)成等比數(shù)列,則b2(a2-a1)的值等于 ______.

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已知-9,a1,a2,-1四個(gè)實(shí)數(shù)成等差數(shù)列,-9,b1,b2,b3,-1五個(gè)實(shí)數(shù)成等比數(shù)列,則b2(a2-a1)=( )
A.8
B.-8
C.±8
D.

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