2007-1-6 10:34 AM
cat.
[已解決]急 - 0 - form4 maths!!
請切換完整版來瀏覽圖片和連結
有冇人識做呀?教下我丫 thanks :em35:
[[i] 本帖最後由 cat. 於 2007-1-6 11:49 AM 編輯 [/i]]
2007-1-6 11:02 AM
Ｈydro;)
[quote]原帖由 [i]cat.[/i] 於 2007-1-6 10:34 AM 發表
請切換完整版來瀏覽圖片和連結
有冇人識做呀?教下我丫 thanks :em35: [/quote]
5^2 - 2 ...
我係估到個function 係咩lor
2007-1-6 11:03 AM
cat.
[quote]原帖由 [i]Ｈydro;)[/i] 於 2007-1-6 11:02 AM 發表
5^2 - 2 ...
我係估到個function 係咩lor [/quote]
點解係5^2 - 2? 可唔可以解釋下??
thanks a lot
2007-1-6 11:35 AM
Ｈydro;)
[quote]原帖由 [i]cat.[/i] 於 2007-1-6 11:03 AM 發表
點解係5^2 - 2? 可唔可以解釋下??
thanks a lot [/quote]
因為(x+1/x)^2 = x^2 + 2 + 1/x^2 ...
咁你個f(x+1/x) = x^2 + 1/x^2 = x^2 + 2 + 1/x^2 - 2 = (x+1/x)^2 - 2
2007-1-6 11:49 AM
cat.
[quote]原帖由 [i]Ｈydro;)[/i] 於 2007-1-6 11:35 AM 發表
因為(x+1/x)^2 = x^2 + 2 + 1/x^2 ...
咁你個f(x+1/x) = x^2 + 1/x^2 = x^2 + 2 + 1/x^2 - 2 = (x+1/x)^2 - 2 [/quote]
唔該你啊
:em49: