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http://picflow.koolearn.com/upload/papers/20140823/20140823130236464416.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823130236480192.gif的降幂排列展开,若 http://picflow.koolearn.com/upload/papers/20140823/20140823130236495250.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823130236573255.gif,且 http://picflow.koolearn.com/upload/papers/20140823/20140823130236605270.gif,当展开式第二项与第三项值相等时, http://picflow.koolearn.com/upload/papers/20140823/20140823130236480192.gif的值为(   )

发布时间:2021-07-12

A.http://picflow.koolearn.com/upload/papers/20140823/20140823130236683220.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823130236807221.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823130236807222.gif

D.http://picflow.koolearn.com/upload/papers/20140823/20140823130236839222.gif

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