已知函数f(x)＝a x－x－a(a>0，a≠1)，那么函数f(x)的零点个数是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='16184' and id < 1358450 and id<>'1358450' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='16184' and id > 1358450 and id<>'1358450' order by id asc limit 5