math help!!!!!
回答 (2)
2008-01-01 5:17 am
✔ 最佳答案
圓心=(-k/2,-(k+1)/2)-----1把1代入x+y+1=0
-k/2-(k+1)/2+1=0
-k-(k+1)+2=0
-2k-1+2=0
-2k=-1
k=1/2
2008-01-01 5:31 am
k=7
x=2
y=-3
4+9+14+(8)(-3)-3=0
4+6+(-10)=0
10-10=0
x=2
y=-3
4+9+14+(8)(-3)-3=0
4+6+(-10)=0
10-10=0
收錄日期: 2021-04-25 17:17:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071231000051KK04035