若x+y-1的绝对值+（y+3）的平方=0，则x-y的值是？
\u82e5x-1\u7684\u7edd\u5bf9\u503c+\uff08y+3\uff09\u7684\u5e73\u65b9=0\uff0c\u6c421-xy-xy\u7684\u5e73\u65b9\u7684\u503cx-1\u7684\u7edd\u5bf9\u503c+\uff08y+3\uff09\u7684\u5e73\u65b9=0
\u4e24\u4e2a\u975e\u8d1f\u6570\u7684\u548c\u4e3a0 \u90a3\u4e48\u4ed6\u4eec\u90fd\u4e3a0
\u6240\u4ee5 x-1=0 y+3=0
\u89e3\u5f97 x=1 y=-3
\u6240\u4ee5
1-xy-xy²
=1-1\u00d7(-3)-1\u00d7(-3)²
=1+3-9
=-5
\u4e0d\u61c2\u53ef\u8ffd\u95ee \u6709\u5e2e\u52a9\u8bf7\u91c7\u7eb3 \u795d\u4f60\u5b66\u4e60\u8fdb\u6b65 \u8c22\u8c22
\u56e0\u4e3a\ufe31x+y\ufe31-(1+y+3)^2=0
\u6240\u4ee5\ufe31x+y\ufe31=0,(1+y+3)^2=0
\u7531,(1+y+3)^2=0,\u5f97y=-4,
\u4ee3\u5165,\ufe31x+y\ufe31=0,\u5f97x=4,
\u6240\u4ee5,x-y=4-(-4)=8
x+y-1的绝对值=0,（y+3）的平方=0
x+y-1的绝对值=0,y=-3
x+(-3)-1的绝对值=0
x-4的绝对值=0
x=4
x-y
=4-(-3)
=4+3
=7
7
绛旓細x+y-1=0 x-y+3=0 鑱旂珛瑙ｅ緱锛歺=-1 y=2
绛旓細鍥犱负(x-1)鐨勭粷瀵瑰鏄ぇ浜庣瓑浜庨浂鐨勶紝(y+3)鐨勫钩鏂逛篃鏄ぇ浜庣瓑浜庨浂鐨勩傚綋杩欎袱涓畻寮忎箣鍜屼负0鏃讹紝璇存槑鍙瓨鍦ㄤ竴绉嶅彲鑳斤紝灏辨槸|x-1|=0涓(y+3)^2=0銆傛墍浠=1銆亂=-3 x-y=1-(-3)=4
绛旓細x鍑忎竴鐨勭粷瀵瑰绛変簬浜,x=-1鎴3 y鐨勭粷瀵瑰肩瓑浜庝笁,y=-3鎴3 x+y=-4鎴6
绛旓細x=1 y=3 [xy-X²]/X²-2xy+y²/xy*x-y/X²=2-6 +3-3=-4
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绛旓細瑙ｇ瓟 X+1=0-->X=-1 Y+3=0-->Y=-3 1-XY+XY鐨骞虫柟=1-3+9=6
绛旓細甯缁濆鍊鐨勬暟锛屾煇鏁扮殑骞虫柟鏄ぇ浜庣瓑浜0鐨 鏍瑰彿涓嬬殑鏁颁篃鏄ぇ浜庣瓑浜0鐨 鑻ヤ笁涓暟鍔犺捣鏉ョ瓑浜0鐨勮瘽锛岃繖涓変釜蹇呴』閮芥槸0 鎵浠x=1 y=-3 z=2
绛旓細绠鍗曪紝x涓1鐨勭粷瀵瑰鏄ぇ浜庢垨鑰呯瓑浜0 (y鍗3)鐨勫钩鏂瑰ぇ浜庢垨鑰呯瓑浜0 x鍗亂鍗亃鐨勫钩鏂规牴澶т簬鎴栬呯瓑浜0 閭ｄ箞鍙湁涓涓彲鑳斤紝x涓1=0锛(y鍗3)=0锛寈鍗亂鍗亃=0 閭ｄ箞X=1锛孻=-3锛孼=2 X+Y-2=-4
绛旓細Y=3 鎴 Y=-3 XY>0 璇存槑X锛孻鍚屽彿 閭ｄ箞锛屾湁2绉嶇粨鏋 鈶燲=3 Y=3 鍒橷+Y=6 鈶=-1 Y=-3 鍒橷+Y=-4 濡傛灉A+B锛0锛孉B锛0 鈭礎B锛0 鈭碅銆丅寮傚彿 鑰孉+B>0 鈭存鏁鐨勭粷瀵瑰澶 閫夛紙C锛夊鏁板钩鏂瑰拰鍏紡锛1²+3²+5²+...(2n-1)²=n(4n²-1)/3 ...
绛旓細鑻ョ偣锛坸,y锛夋弧瓒筹紙x-1锛塣2+y^2=1,浠わ紙x-1锛= cosA,y=sinA,绛夋晥浠ｆ浛,鍒檟=1+cosA,閭ｄ箞x+y+2=1+cosA+sinA+2=cosA+sinA+3,姹俢osA+sinA+3鐨勬渶灏忓,閫堿閫夐」3-鏍瑰彿2
