一架飞机在两个城市之间飞行
\u4e00\u67b6\u98de\u673a\u98de\u884c\u5728\u4e24\u4e2a\u57ce\u5e02\u4e4b\u95f4\u662f\u6c42\u987a\u65f6\u98de\u884c\u548c\u9006\u98ce\u98de\u884c\u7684\u901f\u5ea6\u5417\uff1f
\uff08\u6839\u636eS=vt\u516c\u5f0f\uff0c\u4e24\u57ce\u5e02\u4e4b\u95f4\u7684\u8def\u7a0b\u4e0d\u53d8\uff0c17/6\u5c0f\u65f6\u662f2\u5c0f\u65f650\u5206\uff09
\u8bbe\u6b63\u5e38\u98de\u884c\u7684\u901f\u5ea6\u4e3aV\uff0c\u5219\u987a\u98ce\u98de\u884c\u7684\u901f\u5ea6\u4e3aV+18\uff0c\u9006\u884c\u98de\u884c\u7684\u901f\u5ea6\u4e3aV-18.
\uff08V+18\uff09*\uff0817/6\uff09=\uff08V-18\uff09*3
\u7b97\u51faV=630
\u6240\u4ee5\uff0c\u987a\u98ce\u98de\u884c\u7684\u901f\u5ea6\u4e3a648Km/h\uff0c\u9006\u98ce\u98de\u884c\u7684\u901f\u5ea6\u4e3a612Km/h.
\u6c42\u8ddd\u79bb\u7684\u8bdd\uff0c(630-18)*3=1836Km \u6216 (630+18)*\uff0817/6\uff09=1836Km
2\u5c0f\u65f650\u5206\uff1d17/6\u5c0f\u65f6
\u8bbe\u98de\u673a\u7684\u901f\u5ea6\u4e3aX\u5343\u7c73/\u5c0f\u65f6\uff0c\u5219\u8def\u7a0b\u4e3a\uff0824+X\uff0917/6\u5343\u7c73\u3002
\uff08X+24\uff09\u00b717/6\uff1d(X-24)\u00b73
X\uff1d840
\uff0824+X\uff0917/6\uff1d1008
\u7b54\uff1a\u673a\u901f\u4e3a840\u5343\u7c73/\u5c0f\u65f6\uff0c\u8def\u7a0b\u4e3a1008\u5343\u7c73\u3002
\u4e0d\u61c2\u518d\u6765\u627e\u6211\uff0c\u54c8\u54c8
绛旓細涓鏋堕鏈哄湪涓や釜鍩庡競涔嬮棿椋炶,椤洪闇瑕4灏忔椂,閫嗛闇4.5灏忔椂;娴嬪緱椋庨熶负45鍗冪背/鏃,姹備袱鍩庝箣闂寸殑璺濈銆 鐢ㄦ柟绋嬭В銆 123457fay | 娴忚11144 娆 闂鏈紑鏀惧洖绛 |涓炬姤 閭璇锋洿鏂 2012-01-26 鏈浣崇瓟妗 瑙:璁鹃鏈洪琛岄熷害涓簒銕炪45+x銆慿m/灏忔椂脳4灏忔椂=銆恱-45銆慿m/灏忔椂脳4.5灏忔椂 x=765s=v脳t=銆45+765...
绛旓細绛旓細鏃犻鏃椋炴満鐨勯熷害鏄840鍗冪背/鏃
绛旓細瑙ｅ緱x=840 3脳锛840-24锛=2448鍗冪背
绛旓細瑙:璁椋炴満椋炶閫熷害涓簒鍗冪背/灏忔椂 (x+24)脳5=(x-24)脳6 5x+120=6x-144 6x-5x=120+144 x=264 涓ゅ煄璺濈:(264+24)脳5 =288脳5 =1440鍗冪背
绛旓細涓鏋堕鏈哄湪涓や釜鍩庡競涔嬮棿椋炶锛岄閫熶负24鍗冪背/灏忔椂锛岄『椋庨琛岄渶瑕2灏忔椂50鍒嗭紝閫嗛椋炶闇瑕3灏忔椂锛岋紵瑙ｇ瓟锛氬亣璁鹃鏈洪琛岄熷害涓簒鍗冪背/灏忔椂锛屾牴鎹袱鍩庡競闂磋窛绂讳竴瀹氾紝鍒楀嚭绛夊紡銆傞『椋庨熷害锛歺+24锛涢嗛閫熷害锛歺-24锛2灏忔椂50鍒=17/6灏忔椂 锛坸+24锛*17/6=锛坸-24锛*3 瑙ｅ緱x=840鍗冪背/灏忔椂 鎵浠ヤ袱涓煄甯傞棿...
绛旓細璁椋炴満鐨勯瓒婇熷害涓簒鍗冪背/鏃讹紱,椤洪闇55鍒嗛挓,椤洪閫熷害涓簒+20 閫嗛闇1灏忔椂,閫嗛閫熷害涓簒-20 涓や釜鍩庡競涔嬮棿璺濈涓 55(x+20)/60=(x-20)*1 55x+1100=60x-1200 5x=2500 x=500
绛旓細瑙ｏ細璁椋炴満甯搁熶负X 锛圶+20锛2 3|4 =(X-20) 3
绛旓細璁涓ゅ煄甯鐨勮窛绂讳负X鍗冪背 X梅17/6-24=X梅3+24 18X-17X=锛24+24锛壝51 X=2448 绁濅綘寮蹇
绛旓細瑙ｏ細璁椋炴満閫熷害涓簒鍗冪背涓灏忔椂锛岃涓ゅ煄璺濈涓4(x+45)鍗冪背銆4(x+45)=4.5(x-45)4x+4*45=4.5x-4.5*45 4,5x-4x=4*45+4.5*45 0.5x=8.5*45 x=765 4(x+45)=4*810=3240 绛旓細涓ゅ湴璺濈3240鍗冪背銆
绛旓細璁撅細涓や釜鍩庡競鐨勮窛绂绘槸X鍗冪背銆傞『椋椋炶鏃堕棿2灏忔椂50鍒嗭紝鍗17/6灏忔椂锛屽叾閫熷害涓篨梅(17/6)=6X/17銆傞嗛椋炶鏃堕棿3灏忔椂锛屽叾閫熷害涓篨梅3=X/3銆傚洜鍦ㄦ棤椋庣姸鎬佷笅锛岄琛岄熷害涓鑷达紝閭ｄ箞6X/17-24=X/3+24銆傝В寰 X=2448 鍗冪背銆
