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1.設圓方程式為x2 + y2 - 4x + 2y - 1 = 0,下列何者正確? (A)圓心(2, - 1) (B)半徑2 (C)圓心(4, - 2) (D)半徑6
問題詳情
1.設圓方程式為x2 + y2 - 4x + 2y - 1 = 0,下列何者正確?
(A)圓心(2, - 1)
(B)半徑2
(C)圓心(4, - 2)
(D)半徑6
參考答案
答案:A
難度:
計算中
-1
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【年級】小二下
【評論內容】(x-2)2+(y+1)2=6.....★★★★★★,...
上一篇 :
1.拋物線方程式為Y2=6x ,試求此拋物線的焦點坐標? (A) (B) (C) (D) 。
下一篇 :
1. 圓方程式(x-2)2+(y+1)2=4 ,圓心及半徑為?(A) 圓心(-2,1) ,半徑4 (B) 圓心(-2,1) ,半徑2 (C) 圓心(2,-1) ,半徑4 (D) 圓心
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