等比数列{a n}中，a 2=9，a 5=243，{a n}的前4项和为

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='13575' and id < 1103675 and id<>'1103675' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='13575' and id > 1103675 and id<>'1103675' order by id asc limit 5