若方程2ax 2-x-1=0在（0，1）内恰有一解，则a的取值范围是（ ） 

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='16182' and id < 1357826 and id<>'1357826' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='16182' and id > 1357826 and id<>'1357826' order by id asc limit 5