圖片參考:https://s.yimg.com/rk/AF02894231/o/1053984225.jpg
更新1:
答案 (i) (2n+1)π (ii) -1<1/2
更新2:
f(x)=cos2x+4...
答案 (i) (2n+1)π (ii) -1<1/2
f(x)=cos2x+4...
收錄日期: 2021-04-27 21:23:50
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140923000016KK01931