[微方] 兩題微方級數解

看板Math作者whalelover (哞哞哞哞王)時間13年前 (2012/12/07 20:23)推噓3(3推 0噓 3→)

留言6則, 4人參與討論串1/1

1.Use the method of Forbenius to obtain the general solution of DE xy''-xy'+7=0 on (0,∞). ∞ n+r 令y= Σc_n*x 代入，然後那個7怎樣都消不掉= =" n=0 2.Use the following initial value problem 2 2 t y''+ty'+t y=0, y(0)=1, y'(0)=0 2 -0.5 to show the inverse Laplace transform of (s +1) is Bessel function: -1 1 L (—————)=J (t) √￣2￣￣ 0 s +1 這題我就完全沒頭緒了... -- ◣ ◢ HEY~~~HEY~~~CHAAAAARLIE~! 　。。。。。 ◢ ▁ ◣ ⊙ ⊙ ⊙ .◣ ▼▼▼▼ ㄟ◥ ㄧ◤ \▲▲▲▲ φ ◢ . \ . δ ./ㄨ \\/ˊ◥▄▄◤ \|/ㄑ ( ︶ ˋ\///\/. by Armour@joke -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.112.245.125

推

justinj

12/08 11:01, , 1^F

12/08 11:01, 1^F

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whalelover

12/08 16:16, , 2^F

12/08 16:16, 2^F

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thunderguy

12/08 23:52, , 3^F

12/08 23:52, 3^F