规律填空1.5,15,45,135,( ),( ),( )

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规律填空1.5,15,45,135,( ),( ),( )
规律填空1.5,15,45,135,( ),( ),( )

规律填空1.5,15,45,135,( ),( ),( )
5,15,45,135,( 405),(1215 ),(3645 )
扩大3倍