Qiu jie da,xiexie

qing lao shi jie da qiu ji dao shu xue ti da an 1/a=√a-8^1/2 qiu jie! hao ren you hao bao xiexie xiexie! 求谜底：da jie yong zhen bu yong xian,er jie yong xian bu yong z 求谜底：da jie dian deng bu gan huo,er jie gan huo bu dian deng. jie guan yu DATA-BASED de wen ti ,hen jian dan,qiu ying yu da sh qiu zhu a wo dian nao yi qie huan dao zhong wen shu ru fa da QIU YI BEN SHU ,XIE DE SHI YI GE REN CHONG SHENG ZHI HUO ,DA qiu zheng zui da de bu neng bei ax+by biao shi de shu shi :a