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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: [積分] 一題積分

[ trans_math ]8 留言, 推噓總分: +2

作者: yuyumagic424 - 發表於 2013/05/26 20:04(11年前)

2^F→suhorng:這太詭異了為什麼y大會想到用半角@@？118.166.50.221 05/26 21:06

積分問題

[ trans_math ]4 留言, 推噓總分: +1

作者: metastable - 發表於 2013/05/19 09:32(11年前)

2^F推suhorng:是不是都是Adam's上面的題目？118.166.59.110 05/19 19:00

數列與級數的問題

[ trans_math ]15 留言, 推噓總分: +3

作者: s890269 - 發表於 2013/04/28 17:27(11年前)

1^F→suhorng:limit comparison test: ∫1/x diverges118.166.62.36 04/28 17:45

4^F→suhorng:第一題的 partial sum (如, 加到 n=m) 是:118.166.62.36 04/28 17:47

5^F→suhorng:二樓已經回答了XD118.166.62.36 04/28 17:48

求極值

[ trans_math ]10 留言, 推噓總分: +2

作者: metastable - 發表於 2013/04/11 00:39(11年前)

3^F推suhorng:把(x-t)拆開來成兩項記得product rule118.166.45.205 04/11 00:48

4^F→suhorng:更一般的說會有兩項跑出來一項是直接對118.166.45.205 04/11 00:49

5^F→suhorng:裡面偏微另一項是"套用"微積分基本定理118.166.45.205 04/11 00:50

6^F→suhorng:雖然這裡其實不是用那個啦XD 因裡面也有x.118.166.45.205 04/11 00:50

[極限] 99中正

[ trans_math ]11 留言, 推噓總分: +4

作者: EggAche - 發表於 2013/04/02 23:21(11年前)

5^F→suhorng:@4F: 夾擠是 1 < ... < n^(1/n)118.166.52.167 04/08 20:27

8^F推suhorng:我想錯了..118.166.52.167 04/08 21:10

9^F→suhorng:抱歉118.166.52.167 04/08 21:10

極限問題

[ trans_math ]7 留言, 推噓總分: 0

作者: tasikid - 發表於 2013/03/11 22:29(11年前)

1^F→suhorng:把他弄成黎曼和如何一個1/n提出來118.166.49.231 03/11 22:33

[微分] 求微分值解不太出來

[ trans_math ]9 留言, 推噓總分: +1

作者: tasikid - 發表於 2013/03/04 02:12(11年前)

1^F推suhorng:lim [sin(h)/h - 1]/h =118.166.49.61 03/04 02:20

2^F→suhorng:lim (sin(h) - h)/h^2 =118.166.49.61 03/04 02:21

3^F→suhorng:lim (cos(h) - 1)/h = [cos(t)]' | t = 0118.166.49.61 03/04 02:21

4^F→suhorng:= -sin(0) = 0118.166.49.61 03/04 02:22

6^F→suhorng:羅必答我分母微錯了應該要是2h118.166.49.61 03/04 02:53

[積分] 兩題變數代換法的積分

[ trans_math ]5 留言, 推噓總分: +1

作者: Createeee - 發表於 2013/03/01 23:12(11年前)

1^F推suhorng:1.u=ln(ln x) 2.u=ln(x); v=cosh(v)118.166.49.61 03/01 23:30

2^F→suhorng: cosh(u)118.166.49.61 03/01 23:30

3^F→suhorng:lnx^2是ln(x^2)還是(lnx)^2118.166.49.61 03/01 23:53

Re: [微分] 漸近線的一題

[ trans_math ]27 留言, 推噓總分: +7

作者: BaBi - 發表於 2013/01/29 19:51(11年前)

3^F→suhorng:令 t = 1/x 變數變換得到原式就是118.166.47.38 01/30 10:36

4^F→suhorng:( (1 - 6t + 9t^2)^(1/3) )' at t = 0118.166.47.38 01/30 10:37

20^F→suhorng:也不一定要 [0/0], 其實是在0微分的定義XD118.166.47.38 01/31 17:06

23^F→suhorng:1 "-" 6t + 9t, 應該是 Babi 大手誤XD118.166.47.38 01/31 18:04

[微分]彰師考古題

[ trans_math ]5 留言, 推噓總分: +1

作者: RAIN2012 - 發表於 2013/01/04 00:26(11年前)

1^F推suhorng:1/X^1/2 的微分是 (-1/2) 1/X^(3/2)....118.166.50.84 01/04 00:30

2^F→suhorng:第二題不可以那樣算分開來又不是不定形118.166.50.84 01/04 00:31

3^F→suhorng:分開看就發散了呀...118.166.50.84 01/04 00:31

4^F→suhorng:第三題其實 y = (ln2)log_3 x + constant118.166.50.84 01/04 00:31

5^F→suhorng:所以只要學 log_a x 的微分是什麼就好118.166.50.84 01/04 00:32

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