急!F5 Equations of Circles 8q11
2012-12-12 6:59 pm
請詳細步驟教我計下條 :. Write down the equations of the followingcircles in the general forma)centre at (5,-2) and the radiusis 1b)Centre at (0,-3) and passes through (0,-1/2)
回答 (2)
2012-12-13 12:05 am
✔ 最佳答案
a) (x - 5)2 + (y + 2)2 = 12x2 + y2 - 10x + 4y + 28 = 0
b) Radius = -3-(-1/2)=5/2
(x - 0)2 + (y + 3)2 = (5/2)2
x2 + y2 + 6y + 9 - 25/4 = 0
4x2 + 4y2 + 24y + 11 = 0
2012-12-12 7:35 pm
a) (x - 5)2 + (y + 2)2 = 12
x2 + y2 - 10x + 4y + 28 = 0
b) Radius = 5/2, equation:
(x - 0)2 + (y + 3)2 = (5/2)2
x2 + y2 + 6y + 9 - 25/4 = 0
4x2 + 4y2 + 24y + 11 = 0
x2 + y2 - 10x + 4y + 28 = 0
b) Radius = 5/2, equation:
(x - 0)2 + (y + 3)2 = (5/2)2
x2 + y2 + 6y + 9 - 25/4 = 0
4x2 + 4y2 + 24y + 11 = 0
參考: 原創答案
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