y=-x.y=x-1.y=-5+3x .y=-2x+1谁的函数图像与Y 轴交点在x 轴上方
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y=-x.y=x-1.y=-5+3x .y=-2x+1谁的函数图像与Y 轴交点在x 轴上方
y=-x.y=x-1.y=-5+3x .y=-2x+1谁的函数图像与Y 轴交点在x 轴上方
y=-x.y=x-1.y=-5+3x .y=-2x+1谁的函数图像与Y 轴交点在x 轴上方
f(0)>0即可
故是y=-2x+1的函数图像与Y 轴交点在x 轴上方
(4,5)
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y=-2x+1
(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-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简 x / y(x+y) - y / x(x+y) =
推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做.
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/6=5 2(x+y)-3(x-y)=-2
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(5x+3y)(3y-5x)-(4x-y)(4y+x)=
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
x+y=5; x^y+y^x=17
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?