LIHKG 點解覺得數學公式難背?
毒撚研究所所長 2017-9-27 02:23:02
所以pg啲math course大把open book take home exam
俾你睇晒書同Google都未必識答
:^(

Yup. Unseen problem is often difficult.
e.g. on x^n + y^n = z^n

我個fd 已經讀緊math phd
:^(

同我講數學家做嘅野係睇出事物嘅本質
搵出佢地嘅共點
而文學家就將唔同事物給予唔同定義
所以我諗所謂嘅mathematical mindset應該係將一啲好似好複雜嘅問題搵出佢地本來嘅面目去破解
好啦我講到好抽象
:^(
毒撚研究所所長 2017-9-27 02:23:47
所以pg啲math course大把open book take home exam
俾你睇晒書同Google都未必識答
:^(

Yup. Unseen problem is often difficult.
e.g. on x^n + y^n = z^n

我個fd 已經讀緊math phd
:^(

同我講數學家做嘅野係睇出事物嘅本質
搵出佢地嘅共點
而文學家就將同一事物給予唔同定義
所以我諗所謂嘅mathematical mindset應該係將一啲好似好複雜嘅問題搵出佢地本來嘅面目去破解
好啦我講到好抽象
:^(
吾係一隻貓 2017-9-27 02:25:40
所以pg啲math course大把open book take home exam
俾你睇晒書同Google都未必識答
:^(

Yup. Unseen problem is often difficult.
e.g. on x^n + y^n = z^n

我個fd 已經讀緊math phd
:^(

同我講數學家做嘅野係睇出事物嘅本質
搵出佢地嘅共點
而文學家就將同一事物給予唔同定義
所以我諗所謂嘅mathematical mindset應該係將一啲好似好複雜嘅問題搵出佢地本來嘅面目去破解
好啦我講到好抽象
:^(

我get到喎
啫係類似菠蘿包同腸仔包之間,搵番佢哋係用乜嘢麵粉做出嚟,啱唔啱?
立加青 2017-9-27 02:26:43
明白啲公式點嚟就唔難記

個問題就係唔明點嚟
:^(

介唔介意具體講多少少?
或者舉啲例子,當中講吓你點樣唔明法?唔明邊一個位?

例如教個啲f(x)=2x+y+10 g(x)=2f(x) (當然會複雜啲)
睇老師做個陣 心諗啲xxyy做乜鳩搬嚟搬去有時唔見咗有時又出現番
:^(

g(x) = 2 (2x+y+10) = 4x+2y+20

:^(
咁都唔明不如去驗腦

好彩你改得快 唔係你要去驗腦
:^(

唔知你係唔小心定係真係錯
:^(
:^(
:^(
吾係一隻貓 2017-9-27 02:27:45
所以pg啲math course大把open book take home exam
俾你睇晒書同Google都未必識答
:^(

Yup. Unseen problem is often difficult.
e.g. on x^n + y^n = z^n

我個fd 已經讀緊math phd
:^(

同我講數學家做嘅野係睇出事物嘅本質
搵出佢地嘅共點
而文學家就將同一事物給予唔同定義
所以我諗所謂嘅mathematical mindset應該係將一啲好似好複雜嘅問題搵出佢地本來嘅面目去破解
好啦我講到好抽象
:^(

Arts: Value Judgment
Sciences; Causal Judgment

arts: 諗下條路去邊
sciences: 諗下條路由邊度出發
咁樣諗淺香白易明好多
:^(
吾係一隻貓 2017-9-27 02:28:21
所以pg啲math course大把open book take home exam
俾你睇晒書同Google都未必識答
:^(

Yup. Unseen problem is often difficult.
e.g. on x^n + y^n = z^n

我個fd 已經讀緊math phd
:^(

同我講數學家做嘅野係睇出事物嘅本質
搵出佢地嘅共點
而文學家就將同一事物給予唔同定義
所以我諗所謂嘅mathematical mindset應該係將一啲好似好複雜嘅問題搵出佢地本來嘅面目去破解
好啦我講到好抽象
:^(

Arts: Value Judgment
Sciences; Causal Judgment

arts: 諗下條路去邊
sciences: 諗下條路由邊度出發
咁樣諗淺白易明好多
:^(
做愛用全力 2017-9-27 02:28:30 覺得中學公式難背好多時你因為教數果個教得差
依家幫緊中學雞補習
佢唔知點解x^2-(a+b) x+ab=0係點黎
但係就知點樣做 a^2+b^2既題目
佢連題目點解要let a, b be the roots of quadratic equation 都唔知

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吾係一隻貓 2017-9-27 02:29:29
覺得中學公式難背好多時你因為教數果個教得差
依家幫緊中學雞補習
佢唔知點解x^2-(a+b) x+ab=0係點黎
但係就知點樣做 a^2+b^2既題目
佢連題目點解要let a, b be the roots of quadratic equation 都唔知

sum of root同product of root?
毒撚佔地球 2017-9-27 02:30:33 咁真係好難背啊嘛
:^(
吾係一隻貓 2017-9-27 02:31:00 其實點解sum of root係a+b , product of root係ab , 教科書似乎一直以嚟都冇解釋過
吾係一隻貓 2017-9-27 02:33:42
咁真係好難背啊嘛
:^(

實有原因嘅
:^(

撈亂曬啲xyz可以係原因
背嘢背得冇系統都可以係原因
對數學冇興趣所以唔想背都可以係原因

事在人為啫
會考都無C 2017-9-27 02:33:59
其實點解sum of root係a+b , product of root係ab , 教科書似乎一直以嚟都冇解釋過

呢個有咩好解釋
:^(

要解嘅係Sum of roots = -b/a
吾係一隻貓 2017-9-27 02:35:24
其實點解sum of root係a+b , product of root係ab , 教科書似乎一直以嚟都冇解釋過

呢個有咩好解釋
:^(

要解嘅係Sum of roots = -b/a

仲有product of roots係c/a,點
:^(
解?
毒撚研究所所長 2017-9-27 02:35:57
所以pg啲math course大把open book take home exam
俾你睇晒書同Google都未必識答
:^(

Yup. Unseen problem is often difficult.
e.g. on x^n + y^n = z^n

我個fd 已經讀緊math phd
:^(

同我講數學家做嘅野係睇出事物嘅本質
搵出佢地嘅共點
而文學家就將同一事物給予唔同定義
所以我諗所謂嘅mathematical mindset應該係將一啲好似好複雜嘅問題搵出佢地本來嘅面目去破解
好啦我講到好抽象
:^(

我get到喎
啫係類似菠蘿包同腸仔包之間,搵番佢哋係用乜嘢麵粉做出嚟,啱唔啱?

e.g. 常用的比喻是一個軟膠咖啡杯即使經扭曲重塑為一個「冬甩」(甜甜圈) 狀物件,在拓撲學來說兩個物件仍是一樣,關鍵在於物件中相鄰兩點是否有變。

好似兩樣野係唔同 但可能可以用某種同樣嘅mathematical meaning

e.g.你講費瑪個條式 佢話呢啲問題其實解決左唔係重要左佢解決左條題目 而係在于個mathematician develop左啲咩新嘅tools去解決 個啲新develop出黎嘅mathematical insight先係重點 隨時可以開辟一個新嘅領域 甚至令science/engineering上有突破
做愛用全力 2017-9-27 02:36:39
其實點解sum of root係a+b , product of root係ab , 教科書似乎一直以嚟都冇解釋過

sum of roots 用中文解就好易解
中文直譯就係根的和,本身a,b就係二次方程的根,和咪啫係兩個數加埋

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毒撚研究所所長 2017-9-27 02:37:20
所以pg啲math course大把open book take home exam
俾你睇晒書同Google都未必識答
:^(

Yup. Unseen problem is often difficult.
e.g. on x^n + y^n = z^n

我個fd 已經讀緊math phd
:^(

同我講數學家做嘅野係睇出事物嘅本質
搵出佢地嘅共點
而文學家就將同一事物給予唔同定義
所以我諗所謂嘅mathematical mindset應該係將一啲好似好複雜嘅問題搵出佢地本來嘅面目去破解
好啦我講到好抽象
:^(

我get到喎
啫係類似菠蘿包同腸仔包之間,搵番佢哋係用乜嘢麵粉做出嚟,啱唔啱?

e.g. 常用的比喻是一個軟膠咖啡杯即使經扭曲重塑為一個「冬甩」(甜甜圈) 狀物件,在拓撲學來說兩個物件仍是一樣,關鍵在於物件中相鄰兩點是否有變。

好似兩樣野係唔同 但可能可以用某種同樣嘅mathematical meaning

e.g.你講費瑪個條式 佢話呢啲問題其實解決左唔係重要在佢解決左條題目 而係在於個mathematician develop左啲咩新嘅tools去解決 個啲新develop出黎嘅mathematical insight先係重點 隨時可以開辟一個新嘅領域 甚至令science/engineering上有突破

係咁打錯字
:^(
吾係一隻貓 2017-9-27 02:38:40
其實點解sum of root係a+b , product of root係ab , 教科書似乎一直以嚟都冇解釋過

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依家先發覺唔係想咁問
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自膠
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有料到 2017-9-27 02:38:51
Dse程度可以理解下啲formula嘅,好多都好有趣,大學stat就不了,記完條式都唔夠memory喇葉師傅

AL讀pure asso同u都讀stat

stat果d 你知道條式點黎 上lec聽又好 睇youtube又好 理解完 之後去apply 根本好易上手 完全唔駛死記爛記 stat theory d process同pure maths好似

反而prob就真係我覺得難 習慣諗抽象野 唔慣諗實際野 好搞笑
:^(