2. 外语
  3. For the circle(x - l)2 +(y + l)2= 20 in the xy-plane, find the following. (a)Coordinates of the center (b)Radius (c)Area

For the circle(x - l)2 +(y + l)2= 20 in the xy-plane, find the following. (a)Coordinates of the center (b)Radius (c)Area

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问题 For the circle(x - l)2 +(y + l)2= 20 in the xy-plane, find the following.
(a)Coordinates of the center
(b)Radius
(c)Area
选项
答案20π
解析
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