求两圆x^2+y^2=16 (x-3)^2+(y+4)^2=1内公切线方程
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求两圆x^2+y^2=16(x-3)^2+(y+4)^2=1内公切线方程求两圆x^2+y^2=16(x-3)^2+(y+4)^2=1内公切线方程求两圆x^2+y^2=16(x-3)^2+(y+4)^2
求两圆x^2+y^2=16 (x-3)^2+(y+4)^2=1内公切线方程
求两圆x^2+y^2=16 (x-3)^2+(y+4)^2=1内公切线方程
求两圆x^2+y^2=16 (x-3)^2+(y+4)^2=1内公切线方程
联立两方程 消去x^2 y^2就为公切线方程 -6x+9+8y+16+16=1 化简为 4y=3x-20
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
3^x+2x=y,x
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(x+y)(2x-3y)=?
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
x(x-y)2-(y-x)3
{x+y=3 2x-3y=-16
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简:{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
已知x-y=3,求[(x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值
已知3x =2y 求x/x+y+y/x-y-y²/x²-y²
(x^3-2x^2+xy^2)/(x-y)+(x+y)(y-x)=?
若2x=3y,则(x*x+y*y)/x*x=?