08骞翠腑绱氱稉(j墨ng)婵�(j矛)鍩虹(ch菙)鐭ヨ瓨寰�(f霉)缈�(x铆)鎻愮侗绗簩鍗佸洓绔�

鏇存柊鏅�(sh铆)闁擄細2009-10-19 15:27:29 渚嗘簮锛殀0

鐎忚

鏀惰棌

绗簩鍗佸洓绔� 鐩搁棞(gu膩n)鑸囧洖姝�

1銆佺浉闂�(gu膩n)闂�(gu膩n)绯荤殑绋鍖呮嫭锛氭寜鐩搁棞(gu膩n)绋嬪害鍙垎鐐哄畬鍏ㄧ浉闂�(gu膩n)銆佷笉瀹屽叏鐩搁棞(gu膩n)鍜屼笉鐩搁棞(gu膩n)锛屽畬鍏ㄧ浉闂�(gu膩n)鍗冲嚱鏁�(sh霉)闂�(gu膩n)绯�锛涙寜鐩搁棞(gu膩n)鐨勬柟鍚戝彲鍒嗙偤姝ｇ浉闂�(gu膩n)鍜岃矤(f霉)鐩搁棞(gu膩n)锛涙寜鐩搁棞(gu膩n)鐨勫舰寮忓彲鍒嗙偤绶氭€х浉闂�(gu膩n)鍜岄潪绶氭€х浉闂�(gu膩n)銆�

2銆佺浉闂�(gu膩n)绯绘暩(sh霉)鐨勫彇鍊艰寖鍦嶅湪+1鑸�-1涔嬮枔锛屽嵆-1鈮鈮�+1銆傝嫢0锛渞鈮�1锛岃〃绀哄瓨鍦ㄦ鐩搁棞(gu膩n)闂�(gu膩n)绯�锛�-1鈮鈮�0锛岃〃鏄庡瓨鍦ㄨ矤(f霉)鐩搁棞(gu膩n)闂�(gu膩n)绯汇€傝嫢锛宺=1锛屽墖鐐哄畬鍏ㄦ鐩搁棞(gu膩n)锛況=-1锛岀偤瀹屽叏璨�(f霉)鐩搁棞(gu膩n)锛屾鏅�(sh铆)瀵�(sh铆)闅涗笂鏄竴绋嚱鏁�(sh霉)闂�(gu膩n)绯�銆傛敞鎰忥細r=1鎴�-1鏅�(sh铆)锛岃畩閲忛枔鐨勭浉闂�(gu膩n)闂�(gu膩n)绯绘槸鏈€寮�(qi谩ng)鐨�銆俁=0鏄�锛屽彧琛ㄦ槑璁婇噺涔嬮枔涓嶅瓨鍦ㄧ窔鎬х浉闂�(gu膩n)闂�(gu膩n)绯伙紝鑰屼笉鏄璁婇噺涔嬮枔涓嶅瓨鍦ㄤ换浣曢棞(gu膩n)绯�锛屾湁鍙兘瀛樺湪寰堝挤(qi谩ng)鐨勯潪绶氭€х浉闂�(gu膩n)闂�(gu膩n)绯汇€�

    渚嬶細鏌愬叕鍙哥敘(ch菐n)鍝佺殑鍥哄畾鎴愭湰鐐�3000鍏冿紝鐣�(d膩ng)鐢�(ch菐n)閲忕偤1000鍠綅鏅�(sh铆)锛屽叾绺芥垚鏈偤4000鍏�锛屽墖瑷�(sh猫)鐢�(ch菐n)閲忕偤x锛岀附鎴愭湰鐐簓锛屾纰虹殑涓€鍏冨洖姝告柟绋嬭〃閬�(d谩)寮忔噳(y墨ng)瑭叉槸锛堬級
    A.y = 3000 + x B.y = 4000 + 4x C.y = 4000 + x D.y = 3000 + 4x
    绛旀锛欰
    瑙ｆ瀽锛氱敱鍥哄畾鎴愭湰鐐�3000鍏�锛屽彲鍒ゅ畾鏂圭▼鐨勬埅璺濋爡(xi脿ng)鐐�3000锛屾墍浠ユ帓闄C闋�(xi脿ng)锛涙帴钁楁妸鐣�(d膩ng)x=1000鏅�(sh铆)锛寉=4000浠ｅ叆A鍜孌锛屽彧鏈堿鎴愮珛锛屾墍浠ユ纰虹瓟妗堢偤A?锛涜洏?锛屽彲浠ョ敤4000娓涘幓鍥哄畾鎴愭湰3000寰楀埌鐣�(d膩ng)鐢�(ch菐n)閲忕偤1000鍠綅鏅�(sh铆)锛屽彲璁婃垚鏈槸1000锛屾墍浠ユ埅璺濈偤1000/1000=1锛屾埅璺濋爡(xi脿ng)鐨勭郴鏁�(sh霉)琛ㄧず姣忎竴鍠綅鐢�(ch菐n)鍝佺殑鍙畩鎴愭湰鏄灏�銆�

    渚嬶細鏌愬叕鍙哥敘(ch菐n)鍝佺暥(d膩ng)鐢�(ch菐n)閲忕偤1000鍠綅鏅�(sh铆)锛屽叾绺芥垚鏈偤4000鍏�锛涚暥(d膩ng)鐢�(ch菐n)閲忕偤2000鍠綅鏅�(sh铆)锛屽叾绺芥垚鏈偤5000锛屽墖瑷�(sh猫)鐢�(ch菐n)閲忕偤x锛岀附鎴愭湰鐐簓锛屾纰虹殑涓€鍏冨洖姝告柟绋嬭〃閬�(d谩)寮忔噳(y墨ng)瑭叉槸锛堬級
    A.y = 3000 + x B.y = 4000 + 4x C.y = 4000 + x D.y = 3000 + 4x
    绛旀锛欰
    瑙ｆ瀽锛氶€欑ó椤岀洰鍙垪鏂圭▼绲勶細瑷�(sh猫)瑭叉柟绋嬬偤y = a + bx锛屽墖鐢遍鎰忓彲寰�
    4000 = a + 1000b
    5000 = a + 2000b
    瑙ｈ┎鏂圭▼锛屽緱b=1锛宎=3000锛屾墍浠ユ柟绋嬬偤y = 3000 + x

    渚嬶細鏌愮敘(ch菐n)鍝佺敘(ch菐n)閲忚垏鐢熺敘(ch菐n)鎴愭湰鏈夌洿绶氶棞(gu膩n)绯�锛屽湪閫欐鐩寸窔涓�锛岀暥(d膩ng)鐢�(ch菐n)閲忕偤20000鏅�(sh铆)锛屾垚鏈偤40000锛屽叾涓笉闅ㄧ敘(ch菐n)鍝佺敘(ch菐n)閲忚畩鍖栫殑鎴愭湰鐐�4 500锛屽墖鐢�(ch菐n)鍝佺敓鐢�(ch菐n)鎴愭湰鑸囩敘(ch菐n)鍝佺敘(ch菐n)閲忕殑鍥炴鏂圭▼鏄�(    )銆�
    A锛巠=4000+4500x    B锛巠=4500+4000x C锛巠=5000+4000x D锛巠=4500+1.775x
    绛旀锛欴
    瑙ｆ瀽锛氫笉闅ㄧ敘(ch菐n)鍝佺敘(ch菐n)閲忚畩鍖栫殑鎴愭湰鐐�4 500锛屽彲鍒ゅ畾鎴窛鐐�4500锛屾帓闄C锛涗箣鍚庣敱鐣�(d膩ng)x=20000鏅�(sh铆)锛寉=40000鍙帹鍑�锛屾枩鐜囩郴鏁�(sh霉)鐐猴紙40000-4500锛�/ 20000 =1.775

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