这题线性代数怎么解,1+x 1 1 11 1-x 1 11 1 1+y 11 1 1 1-y
这题线性代数怎么解,1+x 1 1 11 1-x 1 11 1 1+y 11 1 1 1-y
1、x(x-y)(x+y)-x(x+y)^2
(1)(x^2/x)-y-x-y
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
线性代数习题设二维随机变量(X,Y)的联合概率为f(x,y)=ce^-(3x+4y),x>0,y>0;0,其他.求(1)
线性代数:求X,Y.(X 1)=(1 -5)+(4 X+Y)(0 1) (-1 1) (1 0 )
-(x-y+1)乘以(x-y-1)怎么去括号
line(x 8,y 11,x 12,y 11);[save_y change_y-1];putimage(x,y,lo
1、(x-2y)(x+y)
1、y-x/x²-y²
(1)(x+y)^2-(x-y)^2
1 ,化简 (x-y)(x+y)