圆c:x²+y²+4x-3y=0的弦ab长度为根号21且过点(1,1/2)求弦AB所在直线方程
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![圆c:x²+y²+4x-3y=0的弦ab长度为根号21且过点(1,1/2)求弦AB所在直线方程](/uploads/image/z/5427834-42-4.jpg?t=%E5%9C%86c%3Ax%26%23178%3B%2By%26%23178%3B%2B4x-3y%3D0%E7%9A%84%E5%BC%A6ab%E9%95%BF%E5%BA%A6%E4%B8%BA%E6%A0%B9%E5%8F%B721%E4%B8%94%E8%BF%87%E7%82%B9%281%2C1%2F2%29%E6%B1%82%E5%BC%A6AB%E6%89%80%E5%9C%A8%E7%9B%B4%E7%BA%BF%E6%96%B9%E7%A8%8B)
圆c:x²+y²+4x-3y=0的弦ab长度为根号21且过点(1,1/2)求弦AB所在直线方程
圆c:x²+y²+4x-3y=0的弦ab长度为根号21且过点(1,1/2)求弦AB所在直线方程
圆c:x²+y²+4x-3y=0的弦ab长度为根号21且过点(1,1/2)求弦AB所在直线方程
C:x^2+y^2+4x-3y=0
(x+2)^2+(y-1.5)^2=6.25
C(-2,1.5)
d^2=r^2-(√21/2)^2=1
AB:kx-y+0.5-k=0
|-2k-1.5+0.5-k)^2/(1+k^2)=1
k1=0,k2=-3/4
AB:
y=0.5
3x+4y-5=0