圆x^2+y^2-4x+6y=0截x轴所得的弦与截y轴所得的弦的长度比为?
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圆x^2+y^2-4x+6y=0截x轴所得的弦与截y轴所得的弦的长度比为?圆x^2+y^2-4x+6y=0截x轴所得的弦与截y轴所得的弦的长度比为?圆x^2+y^2-4x+6y=0截x轴所得的弦与截y
圆x^2+y^2-4x+6y=0截x轴所得的弦与截y轴所得的弦的长度比为?
圆x^2+y^2-4x+6y=0截x轴所得的弦与截y轴所得的弦的长度比为?
圆x^2+y^2-4x+6y=0截x轴所得的弦与截y轴所得的弦的长度比为?
令y=0,解得x1=0,x2=4:;再令x=0,解得y1=0,y2=-6.即截x轴所得弦的弦长为4,截y轴所得弦的弦长为6,其比值为2比3.
直线的斜率是k则圆被直线所截弦长为sqrt(1+k^2)·|x1-x2| 将直线方程(y=x-5)代入圆方程得 x^2+(x-5)^2-4x+4(x-5)+6=0 化简得2x
令x=0得
y^2+6y=0
|y2-y1|=|0-6|=6
令y=0
x^2-4x=0
|x2-x1|=|0-4|=4
|y2-y1|/|x2-x1|=6/4=3/2
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2
直线x-y-5=0被圆x^2+y^2-4x+4y+6=0所截得的弦的长为?
圆X²+Y²-2X+4Y-3=0被X轴所截得的弦长为?
已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的值
(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
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x*x+2x+y*y-4y+5=0 x= y=
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
{x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值
已知X*X+Y*Y+6X-8Y+25=0 求(Y/X)+(X/Y)-2=?