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試卷名稱：106年 - 106 國立中山大學_碩士班招生考試_電機系(甲、己組)、電波領域：工程數學甲#125264
年份：106年
科目：中山◆電機◆工程數學甲
3. Consider the system represented by the differential equation ẍ+ẍ+kx. Which of the following is true?
(A) the system is critically damped when k = 1
(B) the system is underdamped when k = 1/2
(C) the system is overdamped when k = 0.3
(D) the damping ratio of the system is increased when increasing k
(E) none of the above
