作者查詢 / chrisjon
作者 chrisjon 在 PTT [ trans_math ] 看板的留言(推文), 共40則
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2F→:沒…研究所 我微積分很爛 別刺激我 orz218.168.74.229 03/22 12:46
1F→:第一題,積化和差,x要除以2218.167.99.112 03/19 09:10
1F推:45度應該是1:1:√2吧??218.167.99.112 03/19 09:09
1F推:可以直接這樣帶喔o.oa"61.217.111.45 03/10 20:06
2F→:我想說x^2跟x微分不一樣說…61.217.111.45 03/10 20:06
5F推:唉唉…我是有這樣想,不過…不知道能直61.217.111.45 03/10 20:55
6F→:接代入~.~61.217.111.45 03/10 20:55
2F推:也可以用三角轉換,令x=4secθ125.229.75.217 03/06 01:03
1F推:分母分解成(x-2)(x+1)去算125.229.75.217 03/05 14:01
1F推:謝謝125.229.73.102 02/22 21:53
1F推:1.令y=ln(x-1) dx=e^ydy 解解看125.229.76.34 02/17 09:52
2F→:2.分母拆成a/x + b/(x+3)^2 試試125.229.76.34 02/17 09:55
1F推:我令e^x = t下去算,算出來是125.229.73.152 02/08 12:01
2F→:-x - 1/e^x + ln∣e^x-1∣ + c …125.229.73.152 02/08 12:01
1F推:感謝…計算能力果然有待加強orz125.229.73.152 02/07 22:22
2F→:另外請問,像這種狀況不能拆開嘛?125.229.73.152 02/07 22:22
3F→:是否只有limit的狀況下不能直接拆呢?125.229.73.152 02/07 22:23
7F推:我的意思是,像這題,應該不能變125.229.73.152 02/07 22:38
8F→:e^(-x^2 / 2)/x^4 - cosx/x^4125.229.73.152 02/07 22:38
10F→:主要問的是,是不是只有lim不行這樣拆?125.229.73.152 02/07 23:02
11F→:或者有沒有其他狀況也不能拆的?125.229.73.152 02/07 23:02