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ȴû뵽ûߵǰͿͶģζ
ݾӣһ120ֵԼġһݸһġ
Ƿ´½һͷβؽľоףһȻֻ65֣
ҵĵƹ⽫˿̵ıԵһļ̱
ʱ¿ʱ䣬༶ݸһŶһ²һµԭƽϡ
ֻûԼľӡ
ʱͷαӺ͵һĦһ̶
Ů֪ǫˡ
һ£ȻȻ̯̱ϣԵüɡ
ոһֱڿϷξͼǫ˸кʾǰ
ݸһͷøˣҪûԼľӣϽǷ֮ء
˭֪ǺһҲսеľӣDzšһôĶ
ǰúһضȥݸһһֱĿѿЦøˡ
Ҫڼǫǰˣȫǰ
⸡ͷӵ⣬ɨһ۾Ӿ˵ݸһ֪֪ʱɼǺƷȵģ
һ߰ģ·Լ֣Ʒõ
ݸһһŵؿ治ôܵĻô˼˵ڡ
ܸܵǫͶĿ⣬һʱݡ
ʲôŪDZģ
ȭգָ״̼ĵʹһһ˿ǡ
ݸһͻȻǰгԼľӣҲ飬ֻϽûظϽ뿪Ƿ֮ء
Ѿ֣ŲոҪһ˵ʲô
ŭΡ
ֱ۱ǫסקߴֵǰһеĿ籩ꡣ
лҪ˵㲻Ӣ۾ѽ
дϷŮҲҪиǫкܹҵסһп籩ѽ~
ʮ ͺ
ǫſݸһֱۣתϵľӣֻɨһ۾ͲмЦ120֣˲𰡣
˴ǫʱſģǵһΡ
죬ǰˣû˵
Ůո˵ĻɼƷȣ
~Цб¿ıҺ˵ɣ
ξ忴żǫһקݺݵع˹ƣһ˷ܡ
ǿֲ´ԭֻעĶȫ
ݸһһʱֻøѿˣš65ֵľӣĺһΧš
Ҫȥһ½ǣˡˡĬĬط֣һӿͷ
ȼǫתͷٺݸһ˵ЩʲôʱǸԭվӰѾˣٿϣȥ¥ա
һʱЩģ֪ԼǿͷǶԻǴ
ô죿Сֱˡ
쵽ǫֻ˵һ仰ҲɹõԸ
ҪȳɼҡҪȥݸһ
Ƶģ۵ȴǾ档
ϰָݸһԡ
ǫ˼⣬ôˣ
һԵξųıߣDzǡˣ
ŵмֵ˵ŮÿµǼ죬ڳ̬
ѧǫ㵽dz˰༶һߵˣʱȻͿǰĵƻţݸһʱλдʲô
ƺʲôˣһţűʵʶڲݸֽϹ
ʲôдȴôרעվôö֪
ǫмֺЦΣôõһԴôͲúúأʵ̫ˡ
ֱ߽˶ţݸһԣȴҲ˵
ӣֵݸһˣµ˲ʶرֱ塣
ֽˮʣȴĴд
ͷոһĿɶκfx=ax2+bx+cͼ£ԳΪx=1ʲô˼ΪʲôĿˣ
һʱһҵİ·ڽϾ
˵ңݸһȥһµıӰȻûĪ;һ䡣
ƲƲ죬ЩΡ
ʲôͼǫ㵥һҪDZŮ֪Ͳں
һ뵽ŮˣͿƲסؿʼɬ⼸ܵѧϰռԼ
һʲôˡ
գǫЭһ̾˿ʣôˣ
ĽֻǣҲİݸһȻ̾ɵҲһ顣
ղǵ⣬Եúûʻһ
ʵֻڲݸֽһһдţa0b=2aѭ
ֻģ֪óIJ衭ʣô治ᡣ
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