鎴愪汉楂樿€冮珮璧烽粸鏁�(sh霉)瀛告槗鑰冪煡璀橀粸锛氶煁閬斿畾鐞�
鐎忚
鏀惰棌
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鎴愪汉楂樿€冮珮璧烽粸鏁�(sh霉)瀛告槗鑰冪煡璀橀粸锛氶煁閬斿畾鐞�
闊嬮仈瀹氱悊瑾槑浜嗕竴鍏冧簩娆℃柟绋嬩腑鏍瑰拰绯绘暩(sh霉)涔嬮枔鐨勯棞(gu膩n)绯�銆�
娉曞湅鏁�(sh霉)瀛稿寮楁湕绱㈢摝·闊嬮仈鍦ㄨ憲浣溿€婅珫鏂圭▼鐨勮瓨鍒ヨ垏瑷傛銆嬩腑寤虹珛浜嗘柟绋嬫牴鑸囩郴鏁�(sh霉)鐨勯棞(gu膩n)绯�锛屾彁鍑轰簡閫欐瀹氱悊銆� 鐢变簬闊嬮仈鏈€鏃╃櫦(f膩)鐝�(xi脿n)浠ｆ暩(sh霉)鏂圭▼鐨勬牴鑸囩郴鏁�(sh霉)涔嬮枔鏈夐€欑ó闂�(gu膩n)绯�锛屼汉鍊戞妸閫欏€嬮棞(gu膩n)绯荤ū鐐洪煁閬斿畾鐞�銆�
瀹氱悊闂�(gu膩n)绯伙細
闊嬮仈瀹氱悊鍏紡
闊嬮仈瀹氱悊:鍏╂牴涔嬪拰绛変簬-b/a,鍏╂牴涔嬪樊绛変簬c/a.
x1*x2=c/a
x1+x2=-b/a
闊嬮仈瀹氱悊瑾槑浜嗕竴鍏冧簩娆℃柟绋嬩腑鏍瑰拰绯绘暩(sh霉)涔嬮枔鐨勯棞(gu膩n)绯�銆�
鑸囬煁閬斿畾鐞嗘湁闂�(gu膩n)鐨勬亽绛夎畩褰�
缍�(j墨ng)鍏镐緥椤岋細
宸茬煡浜屾鍑芥暩(sh霉)y=-x2+px+q鐨勫湒鍍忚垏x杌镐氦浜�(α锛�0)銆�(β锛�0)鍏╅粸锛屼笖α>1>β锛屾眰璀夛細p+q>1.
(97鍥涘窛鐪佸垵涓暩(sh霉)瀛哥璩借│椤�)
璀夋槑锛氱敱椤屾剰锛屽彲鐭ユ柟绋�-x2+px+q=0鐨勫叐鏍圭偤α銆�β.鐢遍煁閬斿畾鐞嗗緱
α+β=p锛�αβ=-q.
浜庢槸p+q=α+β-αβ锛�
=-(αβ-α-β+1)+1
=-(α-1)(β-1)+1>1(鍥�α>1>β).
浠ヤ笂灏辨槸灏忕法鏁寸悊鐨勬垚浜洪珮鑰冮珮璧烽粸鏁�(sh霉)瀛告槗鑰冪煡璀橀粸锛氶煁閬斿畾鐞�銆傛洿澶氭垚鑰冩枃瀛楃増娌栧埡璩囨枡銆佹ā鎿│椤屽強姝峰勾鐪熼绛夎硣鏂欙紝鍙互榛炴搳涓嬫柟鎸夐垥鍏嶈不涓嬭級!
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2023鎴愪汉楂樼瓑瀛︽牎鎷涚敓鍏ㄥ浗缁熶竴鑰冭瘯璇枃(楂樿捣鐐�)
闂傚倸鍊搁崐鎼佸箠韫囨稑纾跨€规洖娲犻崑鎾舵喆閸曨偀鏋欓梺杞扮缁夋挳锝為姀銈呭強闁跨噦鎷� 37婵犵數鍋涢悺銊у垝瀹€鍕妞ゆ劧绠戠粈鍕煥閻斿搫孝缁惧墽绮幈銊モ攽閸ャ劉鏋� 闂傚倷鑳舵灙妞ゆ垵妫楅悾婵嬪箹娴ｇ鍋撻崒鐐存櫢闁跨噦鎷� -
2022鎴愪汉楂樼瓑瀛︽牎鎷涚敓鍏ㄥ浗缁熶竴鑰冭瘯璇枃(楂樿捣鐐�)
闂傚倸鍊搁崐鎼佸箠韫囨稑纾跨€规洖娲犻崑鎾舵喆閸曨偀鏋欓梺杞扮缁夋挳锝為姀銈呭強闁跨噦鎷� 5婵犵數鍋涢悺銊у垝瀹€鍕妞ゆ劧绠戠粈鍕煥閻斿搫孝缁惧墽绮幈銊モ攽閸ャ劉鏋� 闂傚倷鑳舵灙妞ゆ垵妫楅悾婵嬪箹娴ｇ鍋撻崒鐐存櫢闁跨噦鎷� -
2021鎴愪汉楂樼瓑瀛︽牎鎷涚敓鍏ㄥ浗缁熶竴鑰冭瘯璇枃(楂樿捣鐐�)
闂傚倸鍊搁崐鎼佸箠韫囨稑纾跨€规洖娲犻崑鎾舵喆閸曨偀鏋欓梺杞扮缁夋挳锝為姀銈呭強闁跨噦鎷� 1婵犵數鍋涢悺銊у垝瀹€鍕妞ゆ劧绠戠粈鍕煥閻斿搫孝缁惧墽绮幈銊モ攽閸ャ劉鏋� 闂傚倷鑳舵灙妞ゆ垵妫楅悾婵嬪箹娴ｇ鍋撻崒鐐存櫢闁跨噦鎷� -
2020鎴愪汉楂樼瓑瀛︽牎鎷涚敓鍏ㄥ浗缁熶竴鑰冭瘯璇枃(楂樿捣鐐�)
闂傚倸鍊搁崐鎼佸箠韫囨稑纾跨€规洖娲犻崑鎾舵喆閸曨偀鏋欓梺杞扮缁夋挳锝為姀銈呭強闁跨噦鎷� 0婵犵數鍋涢悺銊у垝瀹€鍕妞ゆ劧绠戠粈鍕煥閻斿搫孝缁惧墽绮幈銊モ攽閸ャ劉鏋� 闂傚倷鑳舵灙妞ゆ垵妫楅悾婵嬪箹娴ｇ鍋撻崒鐐存櫢闁跨噦鎷�
鏈€鏂拌硣瑷�
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