设实数a，b满足 ，则4a 2+b 2的最大值是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='32859' and id < 2619228 and id<>'2619228' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='32859' and id > 2619228 and id<>'2619228' order by id asc limit 5