已知y=根号x-8 根号8-x 18,求根号x-根号y分之x y
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如题x-24≥0,24-x≥可推出x=24,y=-8,故x/y=-3
y=根号(x-8)+根号(8-x)+18,x-8≥0,8-x≥0x=8,y=18[(x+y)/(根号x+根号y)]-2xy/(x根号y-y根号x)=26/(2√2+3√2)-288/(8*3√2-18
x-8>=0且8-x>=0,x>=8且x
x-8>=08-x>=0∴x=8把x=8代入Y=根号X-8+根号8-X在加18得y=18X-Y=18-8=10
原方程有意义则x+y-8≥0,8-x-y≥0,则8≥x+y≥8,则x+y=8则原方程为0=根号(3x-y-a)+根号(x-2y+a+3),则3x-y-a=0,x-2y+a+3=0又x+y=8联立解得x
1.由题目有x+y-8>=08-x-y>=0所以x+y=82.由1知道√3x-y-a+√x-2y+a+3=0所以3x-y-a=0x-2y+a+3=0又x+y=8求出x=3y=5a=4很明显可以组成直角
∵1-x≥0,x≤1x-1≥0,x≥1∴x=1y=8∴√﹙x+y﹚=√﹙1+8﹚=3∴√﹙x+y﹚的平方根是±√3.
x+根号(5X+10)=8√(5x+10)=8-x两边平方得x^2-21x+54=0x1=18(舍)x2=3(√x+√y)(√x+2+√y)=15(√x+√y+1)^2=16∵√x+√y+1>0∴√x
根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),根据二次根式有意义得:X+Y-8≥0,8-X-Y≥0,∴X+Y≥8,X+Y≤8,∴X+Y=8,左边为0,右边两个非负
根号下大于等于0x-8>=0,x>=88-x>=0,x
x-8>=08-x>=0∴x=8把x=8代入Y=根号X-8+根号8-X在加18得y=18X-Y/根号X-根号y再减去2xy/x倍根号y-y倍的根号x=(√x+√y)-2√(xy)/(√x-√y)=(2
(根号y/根号x-根号y)-(根号y/根号x+根号y)={根号y(根号x+根号y)}/(x-y)-{根号y(根号x-根号y)}/(x-y)=(y+y)/(x-y)因为x=2y所以原式=2y/y=2
原式=[(√x-√y)²+(√x+√y)²]/(√x+√y)(√x-√y)=(x+y-2√xy+x+y+2√xy)/(x-y)=2(x+y)/(x-y)=2(2+√3)/(2-√3
∵X-8≥0,8-X≥0,∴X=8,∴y=0+0+18=18,∴(x+y)/(√x-√y)-2xy/(x√y-y√x)=(x+y)/(√x-√y)-2xy/[(√(xy)(√x-√y)]=(x+y)/
已知y=根号【x-24】+根号【24-x】-8那么x-24≥0,24-x≥0故x=24所以y=0+0-8=-8所以x-y=24-(-8)=32所以X-Y的平方根是±√32=±4√2如果不懂,祝学习愉快
x-8=根号(5X+10)解得x1=3,x2=18∵(根号x+根号y)(根号x+2+根号y)=15∴(根号x+根号y+5)(根号x+根号y-3)=0则根号x+根号y-3=0根号y=3-根号x(x≤9)
原式=(x+y)/(√x-√y)-(2xy)/(x√y-y√x)=(x+y)/(√x-√y)-(2xy)/[√(xy)(√x-√y)]=(x+y)/(√x-√y)-2√(xy)/(√x-√y)]=[(
原式=√y/(√2y-√y)-√y/(√2y+√y)=√y/[√y(√2-1)]-√y/[√y(√2+1)]=1/(√2-1)-1/(√2+1)=(√2+1)/(√2+1)(√2-1)-(√2-1)/
已知y={根号(x-8)+根号(8-x)}+18,根号(x-8)>=0,x>=8;根号(8-x)>=0,x