17. 如右圖所示之電路,試求R值為何?(A) \( -3 - \sqrt{3} \, \Omega \)(B) \( -3 + 3\sqrt{3} \, \Omega \)(C) \( -1 - \sqrt{3} \, \Omega \)(D) \( -1 + 3\sqrt{3} \, \Omega \)