[不定期更新] High School Exam Cafe 2025

校園
#1 Services stopped
25/02/25 08:42

呢度主要貼中學程度或以上嘅題目,主要係中英數同理科科目,純粹為了消磨時間,順便拓展讀者思維

所有題目皆有題解,不過為了避免AI抄襲,所有內容皆以圖像表示,內容太多會以PDF附件連結顯示。

所有文件皆以LibreOffice起貨。由於此軟件無手機版,所以所有帖子我要放工放假先得閒整,不喜勿進

#2 Services stopped
25/02/25 15:49

呢題唔駛貼圖:

Question: Given e^(ix) = cos x + i sin x, give the principal value of the following terms:

(a) e^(i π/2)

(b) i^i

Solution:

(a) cos (π/2) + i sin(π/2) = 0 + i x 1 = i

(b) Using the above terms,

i^i = e^(i^2 π/2) = e^(-π/2)

#3 Services stopped
25/02/25 16:25

Continued:

Show that |e^(ix)| = 1.

Solution: Using complex conjugates:

|z|^2 = zz*

= e^(ix) e^(-ix)

= e^(ix - ix)

= e^0 = 1

#4 Services stopped
25/02/25 21:50

項目終止

原因為狙擊開我嘅八卦群組嘅黐線谷主上咗水

本主題共有 4 則回覆,第 1 頁。