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[線代] 有二題有關二維陣列和矩陣的問題

[ Math ]4 留言, 推噓總分: +2

作者: topgrade168 - 發表於 2013/11/16 00:00(12年前)

3^F推profyang:怎麼不太像線代...11/16 12:23

[微積] ∫1/(x+a)dx=log|x+a|+C，絕對值的由來?

[ Math ]16 留言, 推噓總分: +5

作者: aesth - 發表於 2013/11/14 17:02(12年前)

1^F推profyang:如果x<0,d(log(-x))/dx=-d(log(-x))/d(-x)=-(1/(-x))11/14 17:07

2^F→profyang:=1/x11/14 17:08

3^F→profyang:因為logx只對x>0有定義所以x<0就要像我上面這樣11/14 17:08

4^F→profyang:這才是從微積分基本定理得到的1/x的導函數的完整結果11/14 17:09

5^F→profyang:因為1/x裡面x可以<011/14 17:09

6^F→profyang: 反11/14 17:10

11^F推profyang:x>0的你已經寫出來了d(log(x))/dx=1/x 然後x<0就我寫11/14 18:48

12^F→profyang:的所以總結就是d(log(|x|))/dx=1/x for x=/=011/14 18:48

[中學] 一條簡單極限不懂作,求秒殺

[ Math ]21 留言, 推噓總分: +5

作者: playmypig - 發表於 2013/11/12 22:49(12年前)

4^F推profyang:e^(lim(1/x))?11/12 23:05

5^F→profyang: x->∞11/12 23:05

10^F推profyang:我記得危機分裡有個定理是說可以但要在連續的點11/12 23:15

11^F→profyang:x=∞不知道會不會不嚴謹詳細定理敘述忘了11/12 23:15

13^F推profyang:找到了http://0rz.tw/Sq8xx 裡面的fact211/12 23:28

14^F→profyang:我沒記錯這樣做確實是嚴謹的11/12 23:29

16^F推profyang:不是你看那個連結的fact2 他是要你e^y在y=0連續11/12 23:58

17^F→profyang:y=lim(1/x)只要存在即可11/12 23:58

18^F→profyang: x->∞11/12 23:59

Re: [微積] 這題求k值

[ Math ]3 留言, 推噓總分: +1

作者: ejialan - 發表於 2013/11/12 10:40(12年前)

1^F→profyang:推這篇!其實就是用計算機寫loop!11/12 22:43

[微積] 這題求k值

[ Math ]22 留言, 推噓總分: +5

作者: mongchie0204 - 發表於 2013/11/12 02:07(12年前)

1^F推profyang:牛頓法?11/12 02:11

20^F推profyang:兩邊微分XDDD你微兩次就發現k=無限大了11/12 22:42

Re: [其他] 奇函數只有奇次方項這是對的嗎?

[ Math ]3 留言, 推噓總分: +2

作者: Entropy1988 - 發表於 2013/11/07 01:56(12年前)

2^F推profyang:分別對x,y,z而言都是奇函數11/07 21:41

[中學] 複數2i的平方是否能夠比大小呢？

[ Math ]6 留言, 推噓總分: +3

作者: belleaya - 發表於 2013/11/07 00:05(12年前)

1^F推profyang:只要最後是實數就可以比阿11/07 00:10

4^F推profyang:剛去tutor版看了一整個囧這是有啥好戰的...11/07 00:53

[代數] 求解i^i^i^i^i.....無窮次方

[ Math ]12 留言, 推噓總分: +3

作者: Qoogotozoo - 發表於 2013/11/06 00:55(12年前)

2^F推profyang:原PO你google大神算出來的是1F那個但是你解的是11/06 01:27

3^F→profyang:((i^i)^i)^i....也就是x^i=x解x11/06 01:28

[微方]微方一題

[ Math ]4 留言, 推噓總分: +2

作者: Laoda245566 - 發表於 2013/11/05 22:14(12年前)

4^F推profyang:erf11/08 02:18

[微積] 一題SIN的微分

[ Math ]15 留言, 推噓總分: +8

作者: jacky840816 - 發表於 2013/11/02 17:28(12年前)

4^F推profyang:解答是錯的你也是11/02 17:48

5^F→profyang:婀下篇不是有人給正確答案了?11/02 18:05

9^F→profyang:好吧我收回我的話感覺很可能是你照打解答打錯11/02 20:34

13^F推profyang:我只是在揣度他怎樣覺得他打的解答跟你一樣11/02 21:40

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