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作者 suhorng 在 PTT [ trans_math ] 看板的留言(推文), 共282則

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Re: 有關larson的微積分

[ trans_math ]12 留言, 推噓總分: +6

作者: BaBi - 發表於 2013/07/17 14:10(11年前)

7^F推suhorng:XDDD118.166.45.56 07/19 23:46

8^F→suhorng:現在看來Adams的確有點偏118.166.45.56 07/19 23:47

[考古] 100 嘉義計算第四題

[ trans_math ]6 留言, 推噓總分: +2

作者: fb74123698 - 發表於 2013/07/13 19:38(11年前)

6^F→suhorng:轉成極座標就很容易看出來該怎麼夾擠了118.166.48.166 07/17 01:31

Re: [考古] 91嘉大

[ trans_math ]4 留言, 推噓總分: 0

作者: suhorng - 發表於 2013/07/06 02:17(11年前)

2^F→suhorng:的確是二階差分118.166.47.39 07/07 19:28

3^F→suhorng:不過要弄個極限, 一開始還是沒想到展開118.166.47.39 07/07 19:28

4^F→suhorng:到二次就出來了...118.166.47.39 07/07 19:28

Re: [考古] 91嘉大

[ trans_math ]4 留言, 推噓總分: 0

作者: suhorng - 發表於 2013/07/06 00:33(11年前)

2^F→suhorng:台大微甲考古題出過一樣的題目118.166.47.39 07/06 00:48

3^F→suhorng:可是解答是錯的= =118.166.47.39 07/06 00:48

4^F→suhorng:直覺上就會讓人想把他變成 f''(x)...Y118.166.47.39 07/06 00:49

[考古] 輔大101年，漸進值

[ trans_math ]20 留言, 推噓總分: +2

作者: Trewf - 發表於 2013/07/05 11:24(11年前)

1^F推suhorng://en.wikipedia.org/wiki/Linearization140.112.16.131 07/05 12:15

2^F→suhorng:in short: L(x) := f(a) + f'(a)(x-a)140.112.16.131 07/05 12:16

8^F推suhorng:我猜就是取 a := x_0118.166.47.39 07/05 22:27

9^F→suhorng:這樣就16了 XD?118.166.47.39 07/05 22:28

期考提數列

[ trans_math ]5 留言, 推噓總分: +2

作者: metastable - 發表於 2013/06/24 09:41(11年前)

1^F推suhorng:1/√[1-(-1/4)] = 1/√(4/5) = 2/√5118.166.44.209 06/24 10:39

2^F→suhorng:下面那段就alternating series誤差估計118.166.44.209 06/24 10:39

3^F→suhorng:誤差不超過略去的第一項118.166.44.209 06/24 10:40

5^F→suhorng:感謝樓上118.166.44.209 06/24 18:01

級數2題

[ trans_math ]8 留言, 推噓總分: +2

作者: min102257 - 發表於 2013/06/21 20:28(11年前)

2^F推suhorng:(1)可以用l'Hopital rule不會怪怪的118.166.50.38 06/21 22:19

3^F→suhorng:但是請這樣寫因為這是推論過程：118.166.50.38 06/21 22:19

4^F→suhorng:by l'Hopital rule lim sin(x)/x = 1118.166.50.38 06/21 22:20

5^F→suhorng:as x → 0118.166.50.38 06/21 22:20

6^F→suhorng:since ΣAn conv we have An→0118.166.50.38 06/21 22:20

7^F→suhorng:therefore lim sin(An)/An=1118.166.50.38 06/21 22:20

8^F→suhorng:Since An>0, by limit comparison test...118.166.50.38 06/21 22:21

[考古] 95台大C

[ trans_math ]16 留言, 推噓總分: 0

作者: okajimatt - 發表於 2013/06/18 22:24(11年前)

2^F→suhorng:先求出兩曲面交出來的圓118.166.52.57 06/18 22:49

3^F→suhorng:就可以重積分 (z球面 - z圓錐面)118.166.52.57 06/18 22:49

4^F→suhorng:最好能先畫出圖 (至少要想像出來)118.166.52.57 06/18 22:50

5^F→suhorng:p.s. z^2=x^2+y^2就是cone 這個只有上半118.166.52.57 06/18 22:50

6^F→suhorng:圍的區域是冰淇淋118.166.52.57 06/18 22:50

9^F→suhorng:不知道怎麼用極座標想那就試試不用極座標118.166.52.57 06/18 23:11

10^F→suhorng:相交地方就兩式解聯立而已可以解出那個圓118.166.52.57 06/18 23:11

11^F→suhorng:那就是積分區域118.166.52.57 06/18 23:11

13^F→suhorng:那你是要球座標還是柱座標118.166.52.57 06/18 23:34

14^F→suhorng:兩者都可以算118.166.52.57 06/18 23:34

[張爸] 求收斂與否

[ trans_math ]11 留言, 推噓總分: +1

作者: winter5690 - 發表於 2013/06/16 02:43(11年前)

7^F→suhorng:這每一項都=1/(√(n+1)+√n)118.166.44.76 06/16 18:37

10^F→suhorng:=0吧?118.166.44.76 06/16 23:42

Re: [張爸] 求點到線之距離

[ trans_math ]6 留言, 推噓總分: +1

作者: BaBi - 發表於 2013/05/29 01:36(11年前)

2^F→suhorng:那你給的平面是什麼？140.112.30.135 05/29 09:30

3^F→suhorng:一條直線周圍可是有一整圈平面阿140.112.30.135 05/29 09:30

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