x+7y=m+1 2x-y=4 x+y=2 则2m+1=
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x+7y=m+1 2x-y=4 x+y=2 则2m+1=
x+7y=m+1 2x-y=4 x+y=2 则2m+1=
x+7y=m+1 2x-y=4 x+y=2 则2m+1=
x+7y=m+1 2x-y=4 x+y=2 则2m+1=
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
1、x+2y+z=4x+y+z=102x+3y-z=12、2x-3y+4m=113x+2y+5m=21x+3y+7m=20
设集合m={y|y=2^x,x
{2X+7y=m+1,3x+4y=m
x+2y=2x+y+1=7x-y 求:2x-y?
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
数学计算填空(5x+y)(5x-y)(5x+y)(-5x+y)(5x+y)(-5x-y)(5x+y)(x-5y)(x ^m+y ^n) (y ^n- x^ m)(x ^m+2y-3x^3)²(x-2y)(______)=4y²-x²(__________)²=m²-2m+1(只需要写一个代数式)(__________+3)²=4x²+(_______)
设M={(x,y)||x|+|y|
填空:1.(1)2m(y-x)^2=( )(x-y)^2填空:1.(1)2m(y-x)^2=( )(x-y)^2(2)-2m(y-x)^3=( )(x-y)^3( 3 ) (x+y)(y-x)=-(x+y)( )( 4 ) -m(y-x^2)=m( )
(x-y)(x-2y)+(x-2y)(x-7y),其中X=4,Y=1.5
x+y+2(-x-y+1)=3(1-y-x)-4-(y+x-1),x+y=?
已知/x/=≤1,/y/≤1,设M=/x+y/+/y+1/+/2y-x-4/,求M最大值和最小值,
已知/x/=≤1,/y/≤1,设M=/x+y/+/y+1/÷/2y-x-4/,求M最大值和最小值
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
已知方程组x+2y=2m+7,2x-y=4m-3;且x-3y
已知x,y满足2x-7y=3m,x+2y=4m+5,且x+y=o,求m的值