因為 通解為 y=c1e^x+c2e^(3x) 因為2e^x 跟通解的c1e^x 算是一樣 所以要設 yp=Axe^x 希望您看的懂 不懂的話 翻翻工程數學課本 裡面應該有提到 那個叫做 "修正" 也有要乘x^2的情形 2010-07-09 23:57:19 補充： y"-4y'+4y=2e^2x 通解為重根時 就須修正2次 乘x^2
由小做起，若只可寫上3個字。為方便解說，將這3個字分兩組，一組全英文字母，一組全數字。全英文字母的有3個：A, B, C所以只用全部英文字母的有一種；另外的卡片只能是一個英文字母加2個數字，所以數字共有 2x2 個。組合有：1＋3x2＝1＋2＋2x2＝3＋2x2 (等同書上的...
...43:34 補充： so, u, v can be solved as functions of x, y, z in principle .
The axiom of choice is obviously true, the well-ordering principle obviously false, and who can tell about Zorn's lemma? 選擇公設顯然成立...
...) ∴S(k+1) is true if S(k) is true. By principle of MI, S(n) is true for all positive integers n.
...另外你用的書是R.M Felder的"Elementary Principles of chemical processes"吧? E-Z solve是裡面光碟附的...
... continuously at an annual rate of 5.1% how many years would it take for a principle P to triple? give your answer to the nearest year. ANSWER...
