已知13X^2-6XY+Y^2-4x+1=0,求(x+y)^13乘以x^10

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/24 06:16:45
已知13X^2-6XY+Y^2-4x+1=0,求(x+y)^13乘以x^10
xJ0_YiQhMA@ޤwCP?Fx7t|&“,:Xw_%99AϷ8',Nsq>$Zrv8ΎŠ}yBm~Md_wbyKiWENyboI1!FR|}z-fśzhT _c?k'K5e!3T,&m7D`` hUUϦ O*=x{–7h~z^}eg354N]ԥݱ\β-db"@ÀzflF) n6 

已知13X^2-6XY+Y^2-4x+1=0,求(x+y)^13乘以x^10
已知13X^2-6XY+Y^2-4x+1=0,求(x+y)^13乘以x^10

已知13X^2-6XY+Y^2-4x+1=0,求(x+y)^13乘以x^10
把13X^2-6XY+Y^2-4x+1=0配方,得
13X^2-6XY+Y^2-4x+1=0
9x^2-6xy+y^2+4x^2-4x+1=0
(3x-y)^2+(2x-1)^2=0
又因为(2x-1)^2>=0,(3x-y)^2>=0,
所以只有(2x-1)^2=0,(3x-y)^2=0,即
x=1/2
y=3/2
代入(x+y)^13*x^10=(1/2+3/2)^13*1/2^10=2^13*1/2^10=(2*1/2)^10*2^3=8

13X^2-6XY+Y^2-4x+1=0
9X^2-6XY+Y^2 + 4X^2-4x+1=0
(3x-y)^2+(2x-1)^2=0
由非负性
3x-y=0
2x-1=0
解得
x=1/2
y=3/2
(x+y)^13乘以x^10
=2^13 * (1/2)^10
=2^3
=8

13X^2-6XY+Y^2-4x+1=0
9x^2-6xy+y^2+4x^2-4x+1=0
(3x-y)^2+(2x-1)^2=0
x=1/2
y=3/2
(x+y)^13乘以x^10=(1/2+3/2)^13*1/2^10=2^13*1/2^10=(2*1/2)^10*1/2^3=1/8

已知13X^2-6XY+Y^2-4X+1=0,求(XY-X^2)^5的值. 已知13x^2-6xy+y^2-4x+1=0,求(xy-x^2)^3的值. 已知x-y=6,xy=-1,求(2x+3x-2xy)-(x+4y+xy)-(3yx-2x+2y)的值 已知2/x-1/y=3,则(2y-x+4xy)/(3x-6y-5xy)=? 已知1/x-1/y=2,求3x+7xy-3y/2x-3xy-2y答案是1/x-1/y=2(y-x)/xy=2 得:x-y=-2xy(3x+7xy-3y)/(2x-3xy-2y)=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy)=xy/(-7xy)=-1/7 谁能帮我解释一下=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy) 是怎 已知13X^2-6XY+Y^2-4x+1=0,求(x+y)^13乘以x^10 已知:13x^2-6xy+y^2-4x+1=0,求(x+y)^2013*x^2011 (1)已知x+y=6,xy=-3,x^2y+xy^2=(2)x*[2-(1/x)]+(x/x^2-2x)*(x^2-4) .已知:x-y=1,xy=-2.求:(-2xy+2 x+3y)-(3xy+2y-2x)-(x+4y+xy)的值 已知|X-3Y-1|+(X+Y)^=4XY,求X/Y的值另外还有道:已知X^2+Y^2+6X-4Y+13=0,①求X,Y的值②X^2-Y^2的值已知|X-3Y-1|+(X+Y)^2=4XY,求X/Y的值 已知x y=1,xy=-3,求2xy-4x 4(y-2(xy-x)) 已知x+y=6,xy=4,求x^2y+xy^2的值~ 已知xy+x-y+1=6,(1-x^2)(1-y^2)+4xy=48,求xy-x+y+1的值!一定要今天 已知xy+x-y+1=6,(1-x^2)(1-y^2)+4xy=48,求xy-x+y+1的值 已知xy+x-y+1=6,(1-x^2)*(1-y^2)+4xy=48,求xy-x+y+1的值 已知x-y=3,xy=1,求(-2x+2x+3y)-(3xy+2y-2x)-(x+4y+xy) 1.已知x+y=-4,xy=3,求5(2分之1xy+2y)+[6x-(2xy+y-3x)]的值2.已知(x+3)^2+|x-y+10|=0求代数式5x^2y-[2x^2y-(3xy-xy^2)-3x^2]-2xy^2-y^2的值 已知1/x - 1/y = 2,求3x+7xy-3y / 2x-3xy-2y的值1/x-1/y=2(y-x)/xy=2 得:x-y=-2xy(3x+7xy-3y)/(2x-3xy-2y)=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy)=xy/(-7xy)=-1/71/x-1/y=2到(y-x)/xy=2 是怎么变化的..