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数列满足(为常数,),则等于( ) A.1 B.2 C.3 D.4

数列6ec8aac122bd4f6e满足6ec8aac122bd4f6e6ec8aac122bd4f6e为常数,6ec8aac122bd4f6e),则6ec8aac122bd4f6e等于(   )

      A.1                           B.2                         C.3                          D.4

 

C 【解析】
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