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作者 harry901 在 PTT [ Math ] 看板的留言(推文), 共102則

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Re: [微積] 嚴格遞增函數

[ Math ]2 留言, 推噓總分: +1

作者: znmkhxrw - 發表於 2017/06/25 23:31(7年前)

1^F推harry901: 其實我剛也在想就是等價關係而已06/25 23:35

2^F→harry901: 直接對函數跟變數各取^T 算證明嗎06/25 23:36

Re: [線代] 三角不等式

[ Math ]2 留言, 推噓總分: +2

作者: znmkhxrw - 發表於 2017/05/05 14:19(7年前)

1^F推harry901: 那邊是課本題目內要證明充要條件05/05 14:43

[線代] 三角不等式

[ Math ]11 留言, 推噓總分: +2

作者: harry901 - 發表於 2017/05/05 01:43(7年前)

11^F→harry901: 其實第二行也是要證明的部分那邊我真的沒懂05/05 14:08

[微積] 直角坐標轉圓柱座標

[ Math ]4 留言, 推噓總分: +3

作者: chris100466 - 發表於 2017/05/04 22:24(7年前)

1^F推harry901: 關鍵字：jacobian 座標變換05/04 22:26

[分析] 萊布尼茲對積分做微分證明

[ Math ]16 留言, 推噓總分: +6

作者: znmkhxrw - 發表於 2017/05/03 00:14(7年前)

5^F推harry901: 沒看到G 抱歉我來亂的05/03 03:11

Re: [中學] 三角形的重心

[ Math ]1 留言, 推噓總分: +1

作者: Honor1984 - 發表於 2017/04/29 16:12(7年前)

1^F推harry901: 對吼感恩04/29 17:11

[中學] 三角形的重心

[ Math ]4 留言, 推噓總分: 0

作者: harry901 - 發表於 2017/04/29 03:33(7年前)

3^F→harry901: a b 是B點中垂線交於AC04/29 15:53

4^F→harry901: X是重心在AC 上的投影04/29 15:54

[分析] (x^r)'=rx^(r-1) 論證問題

[ Math ]34 留言, 推噓總分: +10

作者: znmkhxrw - 發表於 2017/04/20 22:38(7年前)

1^F推harry901: 我都看的懂你說的但是卻看不懂你問的真顏汗04/20 23:06

2^F→harry901: 不過我的想法是 x^r 如果要從基本極限定義去推導04/20 23:07

3^F→harry901: 微分過程會遇到(x+a)^r 這部份要打開來做04/20 23:07

4^F→harry901: 取e^ln(x)的作法應該是等價關係04/20 23:08

8^F推harry901: 如果是x^x呢?04/20 23:16

23^F推harry901: 看不懂你們說得我會用就好 (逃跑04/21 00:07

部分分式積分請教各位高手大大

[ Math ]10 留言, 推噓總分: +2

作者: sweetdance - 發表於 2017/04/12 21:14(7年前)

3^F推harry901: 沒有分不出來的二次只有積不出來痛苦04/12 22:28

4^F→harry901: 請愛用公式解硬分通常用到公式解數字都很丑很煩04/12 22:28

5^F→harry901: 如果又遇到i 那更討厭喔～複變函數的積分04/12 22:29

[向量]sin(A+pi/2)=jsin(A)?!

[ Math ]9 留言, 推噓總分: +1

作者: uni1021 - 發表於 2017/04/12 15:55(7年前)

4^F推harry901: 你好像誤會老師意思那個j是容抗造成的在相量圖虛軸04/12 20:12

5^F→harry901: 因為不知道你是在算甚麼不過就你給的式子電流電04/12 20:14

6^F→harry901: 壓相角差90度在相量圖表示剛好差一個j04/12 20:15

7^F→harry901: 最後就是你最後的式子畫上等號確實是比較不通順的04/12 20:17

8^F→harry901: 大概是補習班教法建議不要背04/12 20:17

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