7. 設0£x£2π，－1<k<0是一個常數。已知y＝k和y＝cos x的圖形交於兩點，此二點的x坐標和為多少？ (A) 0 (B) 1 (C) －1 (D) 2π

問題詳情

7. 設0£x£2π，－1(A) 0
(B) 1
(C) －1
(D) 2π

參考答案

答案：D[無官方正解]
難度：非常困難0
統計：A(0),B(2),C(0),D(2),E(0)

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