give 2 circles
1. (x+2)^2+(y-1)^2=20
2. 4x^2 + 4 (y+6)^2=1
find the distance between the centres of the two circles.
F5 circle equation
2009-09-09 10:02 pm
回答 (1)
2009-09-09 10:12 pm
✔ 最佳答案
Center of 1st circle is (-2, 1)Center of 2nd circle is (0,-6)
so distance between centers = sqrt [(-2 - 0)^2 + (1 + 6)^2]
= sqrt ( 4 + 49) = sqrt 53.
收錄日期: 2021-04-25 22:39:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090909000051KK00537