12.已知等差数列.那么.一定有 A. C. 查看更多

 

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已知等差数列与等比数列各项都是正数,且,那么一定有(  )

A. B. C. D.

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已知等差数列{an}和等比数列{bn}各项都是正数,且a1=b1,a2n+1=b2n+1,那么,一定有( )
A.an+1≤bn+1
B.an+1≥bn+1
C.an+1bn+1
D.an+1<bn+1

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已知等差数列{an}和等比数列{bn}各项都是正数,且a1=b1,a2n+1=b2n+1,那么,一定有( )
A.an+1≤bn+1
B.an+1≥bn+1
C.an+1bn+1
D.an+1<bn+1

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已知等差数列{an}和等比数列{bn}各项都是正数,且a1=b1,a2n+1=b2n+1,那么,一定有( )
A.an+1≤bn+1
B.an+1≥bn+1
C.an+1bn+1
D.an+1<bn+1

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已知等差数列{an}和等比数列{bn}各项都是正数,且a1=b1,a2n+1=b2n+1,那么,一定有( )
A.an+1≤bn+1
B.an+1≥bn+1
C.an+1bn+1
D.an+1<bn+1

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