2. 外语
  3. For the circle(x- 1)2 +(y+ 1)2= 20 in the xy-plane, find the following. (a)Coordinates of the center (b)Radius (c)Area

For the circle(x- 1)2 +(y+ 1)2= 20 in the xy-plane, find the following. (a)Coordinates of the center (b)Radius (c)Area

admin2018-12-14  29
问题 For the circle(x- 1)2 +(y+ 1)2= 20 in the xy-plane, find the following.
(a)Coordinates of the center
(b)Radius
(c)Area
选项
答案(a)(1,-1) (b)[*] (c)20π
解析
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