問題詳情

6. 關於函數f (x) = 2sin3x﹐選出正確的選項﹕
(A) − 2 ≤ f (x) ≤ 2
(B)f (x)在 x =π/6 有最大值
(C)f (x)的週期 為 2πㄥ3  
(D)y = f (x)的圖形對稱於直線 x=π/2    
(E)f (2) ＞ 0

參考答案

答案：A,B,C,D
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)