x+x=y x-x=y x乘以x=y x除以x=y x的数字必须一样,四个y加起来等于100 考你算术
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x+x=y x-x=y x乘以x=y x除以x=y x的数字必须一样,四个y加起来等于100 考你算术
x+x=y x-x=y x乘以x=y x除以x=y x的数字必须一样,四个y加起来等于100 考你算术
x+x=y x-x=y x乘以x=y x除以x=y x的数字必须一样,四个y加起来等于100 考你算术
9+9=18
9-9=0
9*9=81
9/9=1
18+0+81+1=100
x=9或-11
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
y=x(x
化简 x / y(x+y) - y / x(x+y) =
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
y=|x|/x乘以2^x的单调性
y=|x|/x乘以2^x的单调性
x+x+x+x+y+y+y=56
(x+y)9次方乘以(x+y)=
[(x/x-y) -1]/(y的平方/x+y)乘以(x-x的平方/x+y),其中x=—2,y=—1.
推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做.
(xy-x^2)乘以(xy)/(x-y)= x(y-x)乘以(xy)/(x-y)= -x(x-y)乘以(xy)/(x-y)= -x^2y这样做对吗?
x+x+x+y+y=6.4 y+y+y+x+x=7.1 怎么算?
二元函数f(x,y)=x+y/x-y,求f(y/x,x/y)
x-y/x+y=(x-y)²/x²-y²(x≠y)
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
已知x=2+根号3,y=2-根号3,计算代数式(x+y/x-y-x-y/x+y)乘以(1/x^2-1/y^2)
x+x+x+y=60 .x-y=4