已知实数X，y满足根号X－1加y十3的绝对值等于0，求X十y的值 已知实数x,y，满足 x-根号y的绝对值 + 根号x的三次方...
\u5df2\u77e5\u5b9e\u6570x\uff0cy\u6ee1\u8db3x\u51cf1\u7684\u7edd\u5bf9\u503c+\u62ec\u53f73x\u52a0y-1\u7684\u5e73\u65b9=0\uff0c\u6c42\u6839\u53f75x\u5341y\u7684\u5e73\u65b9\u7edd\u5bf9\u503c\u548c\u5e73\u65b9\u503c\u5747\u5927\u4e8e\u7b49\u4e8e0\uff0c\u800c\u76f8\u52a0\u7ed3\u679c\u4e3a0\uff0c\u5219x-1=0,3x+y-1=0\uff0c\u5373x=1\uff0cy=-2,\u95ee\u9898\u7ed3\u679c\u4e3a9
x-\u6839\u53f7y\u7684\u7edd\u5bf9\u503c+\u6839\u53f7x\u7684\u4e09\u6b21\u65b9-27=0
\u6240\u4ee5x-\u6839\u53f7y=0
x\u7684\u4e09\u6b21\u65b9-27=0
\u6240\u4ee5x=3
y=x²=9
\u56e0\u6b64(y-5)^x=4^3=64
x-1=0
y+3=0
即x=1 y=-3
x+y=1-3=-2
绛旓細鐢辨潯浠跺彲鐭 x-1=0 y+3=0 鍗硏=1 y=-3 x+y=1-3=-2
绛旓細y=鈭(x-1)+鈭(1-x)+1;鎵浠=1,y=1锛涙墍浠モ垰(x+y³)=鈭2;
绛旓細鐢x鐨瀹氫箟鍩燂紝鈥斺斻x-1>=0锛1-x>=0锛屸斺斻媥=1锛屸斺斻y<3锛屸斺斻嬩辅y-3涓-v(y^2-8y+16)=(3-y)-v(y-4)^2 =(3-y)-(4-y)=-1銆
绛旓細鐢x鐨瀹氫箟鍩燂紝鈥斺斻x-1>=0锛1-x>=0锛屸斺斻媥=1锛屸斺斻y<3锛屸斺斻嬩辅y-3涓-v(y^2-8y+16)=(3-y)-v(y-4)^2 =(3-y)-(4-y)=-1銆
绛旓細鍐嶇珛鏂瑰緱 mn=-27 (3)(2)(3)鑱旂珛 m,n 鏄柟绋媥²-26x-27=0鐨勪袱鏍 (x-27)(x+1)=0 瑙ｅ緱x=27鎴-1 鎵浠=27 n=-1鏃 x-1=27 x=28 y+3=-1 y=-4 m=-1 n=27鏃 x-1=-1 x=0 y+3=27 y=24 鏁厁=28 y=-4 鎴杧=0 y=24 ...
绛旓細鍥犱负:鏍瑰彿涓媥涓1>=0 涓(y鈥2)鏂>=0 鍙:鏍瑰彿x-1+3(y-2)骞虫柟=0 鎵浠:x涓1=0 y涓2=0 瑙ｅ緱:x=1, y=2 鎵浠:x涓y=1涓2=涓1
绛旓細宸茬煡x銆亂涓瀹炴暟,涓攜=鏍瑰彿x-1. 鍔犳牴鍙1-x鍔2,姹倅鐨勫笺 鎴戞潵绛 4涓洖绛 #鐑# 濡備綍缂撹В鐒﹁檻鎯呯华? 鍖垮悕鐢ㄦ埛 2014-07-25 灞曞紑鍏ㄩ儴 杩界瓟 閲囩撼鍢 QQ1119747196 鏈洖绛旂敱鎻愰棶鑰呮帹鑽 宸茶禐杩 宸茶俯杩< 浣犲杩欎釜鍥炵瓟鐨勮瘎浠锋槸? 璇勮 鏀惰捣 鍖垮悕鐢ㄦ埛 2014-07-25 灞曞紑鍏ㄩ儴 宸茶禐杩 宸茶俯杩< 浣...
绛旓細璇峰湪姝よ緭鍏ユ偍鐨勫洖绛旓紝姣忎竴娆′笓涓氳В绛旈兘灏嗘墦閫犳偍鐨勬潈濞佸舰璞
绛旓細缁濆鍊煎拰骞虫柟鍊煎潎澶т簬绛変簬0锛岃岀浉鍔犵粨鏋滀负0锛屽垯x-1=0,3x+y-1=0锛屽嵆x=1锛寉=-2,闂缁撴灉涓9
绛旓細鏄鍑芥暟 鍥犱负x+1鍜x-1閮芥槸澧炲嚱鏁 鏍瑰彿x涔熸槸澧炲嚱鏁 鏍规嵁澶嶅悎鍑芥暟鍚屽寮傚噺鍘熷垯鍗冲彲寰
