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外语
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
admin
2018-12-14
37
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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GRE QUANTITATIVE
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