若是等差数列..则数列的前项和 . 查看更多

 

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是等差数列,,则使前项和成立的最大正数是                                                        (    )

A. 48                    B.47                   C.46                  D.45

 

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是等差数列,,则使前项和成立的最大正数是                                                        (    )

A. 48                    B.47                   C.46                  D.45

查看答案和解析>>

是等差数列,,则使前项和成立的最大正数是                                                        (    )

A. 48                    B.47                   C.46                  D.45

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是等差数列,,则使前项和成立的最大正数是                                                        (    )

A. 48                    B.47                   C.46                  D.45

查看答案和解析>>

是等差数列,,则使前项和成立的最大正数是                                                        (    )

A. 48                    B.47                   C.46                  D.45

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