AB中点x=(7-5)/2=1 ,y=(-4+6)/2=1 中点(1,1)
AB线段的斜率k=(6+4)/(-5-7)=-10/12=-5/6,所以AB的垂线斜率k=6/5.
设y=6/5x+b (1,1)
1=6/5+b
b=-1/6
线性方程y=6/5x-1/6
AB中点x=(7-5)/2=1 ,y=(-4+6)/2=1 中点(1,1)
AB线段的斜率k=(6+4)/(-5-7)=-10/12=-5/6,所以AB的垂线斜率k=6/5.
设y=6/5x+b (1,1)
1=6/5+b
b=-1/6
线性方程y=6/5x-1/6