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
(C)圓心(4, - 2)
(D)半徑
(A)圓心(2, - 1)
(B)半徑
(C)圓心(4, - 2)
(D)半徑
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增
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