鍕捐偂瀹氱悊涓殑鏁板鎬濇兂
涓轰娇鍚屽浠湪杩愮敤瀹氱悊瑙ｉ鏃舵�濊矾寮�闃旓紝
鍚屾椂涔熷彲浠ュ姞娣卞鏁板姒傚康銆?/p>
鍏紡銆?/p>
瀹氱悊鐨勭悊
瑙ｏ紝鍦ㄥ簲鐢ㄥ嬀鑲″畾鐞嗘椂瑕佹帉鎻′竴浜涢噸瑕佺殑鏁板鎬濇兂鏂规硶銆?/p>
涓�銆佸垎绫昏璁烘�濇兂
鍒嗙被璁ㄨ鎬濇兂鏄В棰樻椂甯哥敤鐨勪竴绉嶆�濇兂鏂规硶锛?/p>
鍚屽浠鏋滄帉鎻′簡杩欑鏂规硶锛?/p>
鍙互浣挎�濈淮
鐨勬潯鐞嗘�с�佺紲瀵嗘�с�佺伒娲绘�у緱鍒板煿鍏伙紝鍦ㄨВ棰樹腑鎵嶈兘鐪熸鍋氬埌涓嶉噸涓嶆紡锛?/p>
渚?/p>
1
鍦ㄢ柍
ABC
涓紝
AB
=15
锛?/p>
AC
=20
锛?/p>
BC
杈逛笂鐨勯珮
AD=
12
锛岃瘯姹?/p>
BC
杈圭殑闀匡紟
瑙ｆ瀽锛?/p>
涓夎褰腑鏌愯竟涓婄殑楂樻棦鍙湪涓夎褰㈠唴閮紝
涔熷彲鍦ㄤ笁瑙掑舰澶栭儴锛?/p>
鏁呮棰樺簲鍒嗕袱绉嶆儏
鍐垫潵鑰冭檻锛?/p>
鍥?/p>
1
鍥?/p>
2
褰?/p>
BC
杈逛笂鐨勯珮
AD
鍦ㄢ柍
ABC
鐨勫唴閮ㄦ椂锛?/p>
濡傚浘
1
锛?/p>
鐢卞嬀鑲″畾鐞嗭紝
寰?/p>
BD
2
锛?/p>
AB
2
锛?/p>
AD
2
锛?/p>
152
锛?/p>
122
锛?/p>
81
锛?/p>
寰?/p>
BD
=9
锛?/p>
CD
2
锛?/p>
AC
2
锛?/p>
AD
2
锛?/p>
20
2
锛?/p>
12
2
锛?/p>
256
锛?/p>
寰?/p>
CD=
16
锛?/p>
鍒?/p>
BC
锛?/p>
BD
锛?/p>
CD
锛?/p>
25
锛?/p>
褰?/p>
BC
杈逛笂鐨勯珮
AD
鍦ㄢ柍
ABC
鐨勫閮ㄦ椂锛?/p>
濡傚浘
2
锛?/p>
鍚屾牱鐢卞嬀鑲″畾鐞嗗彲姹傚緱
CD
=16
锛?/p>
BD
=9
锛?/p>
杩?/p>
鏃?/p>
BC
=
CD
-
BD
=7
锛庢晠
BC
杈圭殑闀夸负
25
鎴?/p>
7
锛?/p>
鐐硅瘎锛?/p>
姝ら濡傛湁鍥惧舰鍒欏皢鍙樺緱寰堢畝鍗曪紝鎸夊浘褰㈣В绛斿嵆鍙紟
浣嗚嫢娌℃湁鍥惧舰锛屽垯闇�瑕佽璁哄嚑
绉嶅彲鑳界殑鎯呭喌锛庤繖姝ｆ槸
鈥?/p>
鏃犲浘棰樺墠缁嗘�濊�冿紝鍒嗙被璁ㄨ淇濆懆鍒?/p>
鈥?/p>
锛?/p>
浜屻�佹暟褰㈢粨鍚堟�濇兂
鍦ㄨ繍鐢ㄦ暟褰㈢粨鍚堟�濇兂鑰冭檻闂鏃讹紝
鏃㈠彲鎶婃暟閲忓叧绯昏浆鍖栦负鍥惧舰鐨勬�ц川闂鏉ヨВ鍐筹紝
涔熷彲
鎶婂浘褰㈢殑鎬ц川闂杞寲涓烘暟閲忓叧绯荤殑闂鏉ュ鐞嗭紟
鍕捐偂瀹氱悊鏈韩灏辨槸鏁板舰缁撳悎鐨勫畾鐞嗭紝
瀹冪殑
楠岃瘉鍜屽簲鐢ㄩ兘浣撶幇浜嗘暟褰㈢粨鍚堢殑鎬濇兂锛?/p>
鎵�浠ワ紝
杩愮敤鍕捐偂瀹氱悊鍙互椤哄埄瑙ｅ喅鏌愪簺鍏锋湁骞虫柟鐗瑰緛
鐨勪唬鏁伴棶棰橈紝鍙嶄箣浜︾劧锛?/p>
渚?/p>
2
鑻?/p>
x
锛?/p>
y
涓烘瀹炴暟锛屼笖
x
+
y
=4
锛?/p>
2
2
1
4
x
y
飥?/p>
飥?
飥?/p>
鐨勬渶
灏忓�兼槸澶氬皯锛?/p>
瑙ｆ瀽锛氳嫢鑳借�冭檻鍒?/p>
2
1
x
飥?/p>
鏄互
x
锛?/p>
1
锛?
2
4
y
飥?/p>
鏄互
y
锛?/p>
2
涓虹洿瑙掕竟鐨勭洿瑙掍笁瑙掑舰鏂滆竟鐨勯暱锛岄偅涔堜笂杩伴棶棰樺氨鍙樻垚浜嗘眰涓ゆ潯绾挎鍜岀殑鏈�鍊奸棶棰橈紟濡傚浘锛?/p>
绾挎
AB
=4
锛?/p>
P
涓?/p>
AB
涓婁竴鍔ㄧ偣锛?/p>
璁?/p>
PA=x
锛?/p>
PB=y
锛?/p>
CA
鈯?/p>
AB
锛?/p>
DB
鈯?/p>
AB
锛?/p>
A
銆?/p>
B
涓哄瀭瓒筹紝
涓?/p>
CA
=1
锛?/p>
BD
=2
锛屽垯
PC
锛?/p>
PD
2
2
1
4
x
y
飥?
飥?/p>
飥?/p>
飥?/p>
锛庢槗鐭ュ綋鐐?/p>
P
銆?/p>
C
銆?/p>
D
鍦ㄥ悓涓�鏉＄洿绾夸笂鏃讹紝
PC
+
PD
鏈�
灏?/p>
锛?/p>
浣?/p>
CE
鍨?/p>
鐩?/p>
DB
鐨?/p>
寤?/p>
闀?/p>
绾?/p>
浜?/p>
鐐?/p>
E
锛?/p>
鏄?/p>
鐭?/p>
EC
=4
锛?/p>
ED
=2+1=3
锛?/p>
鏁?
PC
+
PD
=
DC
2
2
3
4
5
飥?/p>
飥?/p>
飥?/p>
锛庢晠
2
2
1
4
x
y
飥?/p>
飥?
飥?/p>
鐨勬渶灏忓�间负
5
锛?/p>
鐐硅瘎锛氭棰橀毦鍦ㄥ褰㈠
2
2
a
b
飥?/p>
寮忓瓙鐨勭悊瑙ｏ紝
2
2
a
b
飥?/p>
琛ㄧず浠ユ鏁?/p>
a
b
锛?/p>
涓虹洿瑙掕竟鐨?/p>
鐩磋涓夎褰㈢殑鏂滆竟锛?/p>
鐪嬪埌杩欎釜寮忓瓙搴旂珛鍒诲湪澶磋剳涓骇鐢熻繖涓洿瑙掍笁瑙掑舰锛?/p>
杩欏綋鐒堕渶瑕佺粡楠岀殑
绉疮锛屾湁浜嗚繖涓洿瑙掍笁瑙掑舰锛岃В鍐抽棶棰樹究鏈変簡鎬濊矾锛?/p>