3.等差数列{an}中.a5 + a7 =16.a3 = 4.则a9 =( ) A.8 B.12 C.24 D.25 查看更多

 

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3、等差数列{an}中,a5+a7=16,a3=4,则a9=
12

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等差数列{an}中,a5 + a7 =16,a3 = 4,则a9 =


  1. A.
    8
  2. B.
    12
  3. C.
    24
  4. D.
    25

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等差数列{an}中,a5 + a7 =16,a3 = 4,则a9 =(   )

A.8B.12C.24D.25

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1.等差数列{an}中,a5 + a7 =16,a3 = 4,则a9 =(    )

A.8                           B.12                          C.24                          D.25

 

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1.等差数列{an}中,a5 + a7 = 16,a3 = 4,则a9 =(    )

A.8                           B.12                      C.24                              D.25

 

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