求详细解答过程,谢谢啦,

2024-12-05 15:40:34
推荐回答(2个)
回答1:

回答2:

7、圆心(1,0)到直线x-y=0的距离是:
d=|1-0|/√[1^2+(-1)^2]
=1/√2
=√2/2
8、
(4-k)/(k-3)=-2/[2(k-3)]
4-k=-1
k=5