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6. 方程式x2+y2-4x+2y+k=0的圖形為一個圓,則下列何者為可能的k值?(A)3 (B)6 (C)9 (D)12
問題詳情
6. 方程式x2+y2-4x+2y+k=0的圖形為一個圓,則下列何者為可能的k值?
(A)3
(B)6
(C)9
(D)12
參考答案
答案:A
難度:
計算中
-1
書單:
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上一篇 :
75. 設 x, y 是實數,且x2+4y2=1,則3x2+2y 的最大值為何?(A) (B) −1(C) 1 (D)
下一篇 :
7. 求 之值為何?(A)1 (B) 2 (C) 3 (D) 4
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