問題詳情
13. 設一雙曲線之漸近線為 3x-2y+9=0 及 3x+2y-3=0，且有一焦點為(－1,3+ √52 )，則雙曲線的共軛軸長為
(A) 6
(B) 8
(C) 10
(D) 12
(E) 16。
(A) 6
(B) 8
(C) 10
(D) 12
(E) 16。
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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