作者查詢 / profyang

總覽項目：發文 | 留言 | 暱稱

作者 profyang 在 PTT [ Math ] 看板的留言(推文), 共376則

限定看板：Math

看板排序：

全部JinYong6019C_Chat2178ONE_PIECE1395AC_In1225Physics1072MATLAB1070pal918Falcom913CFantasy891GO797FAIRYTAIL719Hunter605Isayama492sex420comm_and_RF412Beauty378Math376NTU333PokeMon236iOS205EEBadminton203NTUEE111HW190Free_box151TaiwanDrama140StupidClown138Gossiping131NTUEE111118AOE115China-Drama109HarryPotter104PSP-PSV96Expansion0791Boy-Girl89Old-Games84LightNovel76NTUDormM662Stephy55GuJian54CCRomance52H-GAME46PushDoll44EZsoft42FuMouDiscuss40NtuDormM839Weyslii39joke37TigerBlue32NTUbadminton31Badminton27HK-movie25HeluoGame24movie24Hate20BBSmovie19Electronics17jawawa17PlayStation15Suckcomic14creditcard13japanavgirls13NDHU-His_MV13Acad-Affairs12KS98-30212humanity11NDMC-BADMINT11NtuDormM310NTUEETST9RDSS9CATCH8mobile-game8NDS8ChiLing6CoC6HCHS603126Mind6NTHU_STAT946NTUmed916PublicIssue6HLHS_10thU5KS96-3055P2PSoftWare5USC5WuLing46-3175Comic4Hip-Hop4NTU_Beauty4NTUDormM74NTUEE1124NTUEE112HW4TA_AN4Windows4yihan4ArakawaCow3ASIA-uni3CHSH-92-3193FJU-ACCR943FOREST_BIO3LS_Badminton3Militarylife3NCCU08_JAPAN3NCUFingrad033NDHU-His1003NKFUST-CCE903NtuDormM13NTUEE1133NTUHistory033SCU_chem903SMSlife3Spore3SSSH-16th3133Tech_Job3WorldCup3ask2biker2Bunco2cat2Chan_Mou2ck59th3032cksh84th3122CSMU-MED952CYSH97Y3182dlsh-7th-3032EAseries2EHHS24th_J3G2ESP2FCU_EE97A2FGU2FJU-Law20072FJU_physics2gallantry2hikarugo2ILSH-943132Instant_Mess2KanColle2KS96-3032KS97-3012Lab7202lizen34-6012MCJH_33092MCU_Talk2Miaoli2Modchip2Mudran2MUSTMIS2NCCU07_Arab2NCU97ME-B2NCUIM942NDHU-His962NDMC-M1082NEHS19th42NTCU-SPE92A2NTHU-EE-CAPT2NTOU-MME-99B2NTTU_CSIE992NTU-Karate2NTUcourse2NTUE-PD012NTUT_EE490A2NUTN_EE1012NUU_Talk2pccu_physics2PCSH91_3052Philo-BMT2politics2scutran_city2TFSHS66th3072TKU_EW94B2TMU9792TYSH49-3022Visual_Basic2YiGo3112AfterPhD1AntiVirus1ascii_wanted1ASHS-93-li1ASHS-94sin1AT_Badminton1B01310XXX1b962040XX1b982040XX1BCC_Midnight1C_and_CPP1C_ChatBM1CCU-GIE951CCU_ACCGS981CH12th3081Chihlee1CHSH-3191CHU1CJCU_HCA981ck54th3011ck59th3261ck61st3091ck61st3301cksh83rd3091cksh85th3171cksh85th3201CKSHTalk1CLVSC1CMS_97_S3F1CMU_M481CosmosPeople1cosplay1CrossStrait1CS_Badminton1CSMU-Chorus1CSMU-HSA951CSMU-HSA961CSMU-MIS951CSMU-MT-BMT1CSMU-OT961CSU1CT24th3371CTSH91-3021CYCU_MIS_93A1CYCU_Talk1Doraemon1DragonQuest1DYU1ECClab1eco1Econcu951FamilyCircle1fastfood1FCU-PF20061feminine_sex1FITNESS1FJ_Astroclub1FJU-EE-2004B1FJU-Laws971FJU-Leader1FJU-Stat95A1FJU_CHESS1FJU_CPSY_VL1FJU_IHS_dorm1FJU_JCS111FJU_SW_SBMan1Fortune1FSHS-93-3101FuHo14th3181GIEE_951Gintama1Grad-ProbAsk1graduate1Gulong1HatePicket1HCSH_10th3121HCSHch13_3111HGSH963031hjsh1HSNU_10631HSNU_10951HSNU_11031HSNU_11151HSNU_11431HSNU_9021HSNU_NTU1HY-40-Xin1ILSH-973091ILSH-983051kawaii1KHCHS-93-3061KHCHS_TALK1KingdomHuang1KNU1KS92-3191KS96-2021KS97-3021KS97-3101KS97-3151KS_PMAC1KUAS1L_TalkandCha1LandBadminto1LaTeX1LD_IM93-11LED_MOUTH1Left_Village1lesbian1Little-Games1LoL1love-vegetal1LTJH-943061LTK1Marginalman1Master_D1ME_BADMINTON1medstudent1Miracle1MIT1MSEbadminton1NCCU06_JAPAN1NCCU08_Math1NCCU99_LAND1NCHU-ACC1011NCHU-photo1NCHU_MKT981NCKU_IIM1NDHU-AIPhy1NDHU-His_WB1NDHU-MBA951NDHU-Phy-VB1NDMC-D621NDMC-N571NDMC-PH231NHU_LD921NKFUST1NKMU1NTHU-MSE091NTHU-Socio1NTNUch-961NTPU-ACCM941NTPU-STAT951NTPU-STATBAD1NTU-K71NTU_BOTDorm21NTU_Service1NTUAC-Badmin1NTUAC961NTUAC971ntuACCT001NTUastclub1NTUBA011NTUBIME-1021NTUBSE-B-1001NTUCH-Badmin1NTUCHEbmton1NTUdent961NTUE-Art961NTUE-EPC-981NTUE-TCL971NTUE_NSE1001NTUE_Nse961NTUEE1071NTUEE110HW1ntufiction1NTUHKMSA1NTUOCGeo1NTUST-DC-B961NTUST-EE-B951NTUST-TX-B921NTUST-TX-B961NTUST_Talk1NTUT_CH585A1NTUT_Talk1NTUTTST1NUTN_SSSS1Office1Python1R951210XX1R983220PT1RO1RSSH92_3051SCU_ACCM951scu_transfer1SFHS1ShuangHe1SJU1SM05th3xx1SO-Badminton1SocialScup1SSSH-16th-Fk1StatSoftball1STDM-93-3031STDM-94-3151sttmountain1STUST1Tennis1TFSHS65th3151TFSHS68th3161TFSHS69th3181THU-CHE931THU-CHE961THU-CHEM941THUIM-4th1THUIM-5th1TKU_ACC_95A1TKU_JPBasket1TNFSH96101TTU-AFL1TTU-talk1TTU-Transfer1twin1TypeMoon1TYSH48-3011Viator96Gang1Viator96Gi1WuLing50-3021YoungDotx31YoYo571YP94-3101YP95-3121YPU1Yunlin1Yup06-091YZU_CN99A1<< 收起看板(396)

首頁

尾頁

[微積] 極限

[ Math ]13 留言, 推噓總分: +5

作者: nobrother - 發表於 2013/10/29 22:33(12年前)

1^F推profyang:誰跟你趨近常數...10/29 22:40

8^F推profyang:btw你那個極限就LH上下微分即可10/29 22:48

[微積] 微分

[ Math ]34 留言, 推噓總分: +8

作者: kororoDX - 發表於 2013/10/29 21:38(12年前)

5^F推profyang:先帶x=1再求極限比較好一點10/29 22:20

10^F推profyang:我就是怕極限不存在才建議先代阿~那才是f'(1)的定義10/29 23:00

27^F推profyang:問題在於你先求f'(x)再代1進去這個"代1進去"的動作可10/30 00:12

28^F→profyang:能根本無法執行(例如微分不存在) 所以直接求極限然後10/30 00:13

29^F→profyang:發現極限不存在邏輯上比較通當然如果你求得f'(x)其10/30 00:13

30^F→profyang:實應該已經得出f'(x)在x=1不存在的結論了只是後面要10/30 00:14

31^F→profyang:再"代1進去"這個動作就沒有意義所以嚴格來講你做的10/30 00:14

32^F→profyang:事情還是只是求f'(1)那一個極限10/30 00:15

[工數] 常微分方程脈衝函數

[ Math ]19 留言, 推噓總分: +3

作者: YamadaRyo - 發表於 2013/10/28 02:06(12年前)

13^F推profyang:對阿為什麼不直接用laplace解...還要用猜的= =10/28 11:43

[其他] 求級數和

[ Math ]9 留言, 推噓總分: +4

作者: gnsh - 發表於 2013/10/25 19:44(12年前)

3^F推profyang:靠...1F太威了10/25 20:26

Re: [微積] 有關lim sinθ／θ＝１證明

[ Math ]4 留言, 推噓總分: +1

作者: ytyt5239 - 發表於 2013/10/24 23:28(12年前)

3^F推profyang:EB<ED10/25 18:10

4^F→profyang:因為角EBD是直角10/25 18:11

[微積] 有關lim sinθ／θ＝１證明

[ Math ]33 留言, 推噓總分: +14

作者: ytyt5239 - 發表於 2013/10/23 19:39(12年前)

5^F推profyang:說泰勒展開的...你推出sin微分不需要題目這個極限嗎?10/23 20:02

6^F→profyang:此外之前好像有人說過這個證明太簡略沒有證明AB弧10/23 20:03

7^F→profyang:為何大於AB線 AB線大於BC線是三角不等式但AB弧大於10/23 20:03

8^F→profyang:AB線可能還是要類似用多邊形去取極限思考總之太簡略10/23 20:04

11^F推profyang:是可以當已知啦~不過弧這種東西...感覺微積分就是要10/23 20:08

12^F→profyang:把高中沒講清楚的這些極限的東西講清楚10/23 20:08

14^F→profyang:例如要怎麼定義那段弧的長度之類的10/23 20:09

17^F推profyang:面積好像是個不錯的選擇不過這樣sin角度會變兩倍或10/23 22:10

18^F→profyang:一半但總之應該是可以證明10/23 22:10

[其他] log的問題~

[ Math ]40 留言, 推噓總分: +9

作者: wdg - 發表於 2013/09/30 19:31(12年前)

20^F推profyang:其實大學理工相關科系大都還是寫ln~只有比較數學的書09/30 22:18

21^F→profyang:才是寫log 畢竟理工的書中還是常會用到log_1009/30 22:18

[中學] e^x-10cosx=0

[ Math ]16 留言, 推噓總分: +6

作者: ChenYM - 發表於 2013/09/29 13:39(12年前)

8^F→profyang:高中怎麼會教牛頓法XDDD09/29 18:12

9^F→profyang:最簡單明瞭的數值解方法就牛頓法了吧自己matlab寫個09/29 18:13

10^F→profyang:code大概3~5行就解決了09/29 18:14

11^F→profyang:我上面兩樓是在回大學的方法09/29 18:14

[其他] 填入1~9不重複

[ Math ]3 留言, 推噓總分: +3

作者: MaseratiGTS - 發表於 2013/09/26 21:03(12年前)

9^F推profyang:噗~這是傳說中的那題嗎?召喚t2d數學大神!!09/26 23:43

Re: [向量] 證明A ×(B ×C)=B．(A．C)-C．(A．B)

[ Math ]5 留言, 推噓總分: +4

作者: harveyhs - 發表於 2013/09/26 17:37(12年前)

1^F推profyang:幫補充:已知a和b比例只需代入A=B=(1,0,0) C=(0,1,0)09/26 20:08

2^F→profyang:即可定出比例常數09/26 20:08

4^F推profyang:cross product不是定義在三維的嗎?09/26 22:33

首頁

尾頁