4x+2y=140,
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4x+2y=140,4x+2y=140,4x+2y=140,这个是不佛那个方程.有无数个解.比如:x=1y=68x=2y=66x=3y=64x=4y=62.有不明白的可以追问!谢谢!祝学习进步!当x=
4x+2y=140,
4x+2y=140,
4x+2y=140,
这个是不佛那个方程.
有无数个解.
比如:
x=1 y=68
x=2 y=66
x=3 y=64
x=4 y=62
.
有不明白的可以追问!谢谢!
祝学习进步!
当x=1时,y=?。当x=2是。y=?。。。。。。。。。。。
一个式子。两个未知数,无唯一解!
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
(x-4y)(2x+y)=
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
(x+y)^2(x-y)^2(x^4+x^2y^2+y^4)=?
y'=(y/x)^2+y/x+4微分方程
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
x*x+2x+y*y-4y+5=0 x= y=
如果|X|=4 |Y|=2 且|X+Y|=X+Y 求X+Y
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9