推 math1209:你問的問題很奇怪 = = 04/14 22:36
→ nick0418:啊我漏字 要怎麼把方程式用Legendre polynomials展開 04/14 22:45
推 CHTM:傅立葉級數怎麼算的你就比照辦理囉 04/15 00:19
推 tourney:2/3P0(x)+2P1(x)-2/3P2(x)??(a piece of cake?)(as easy a 04/15 12:56
→ nick0418:嗯答案是樓上的可是我不知道要怎麼推出來 04/15 22:36
→ nick0418:是先把 1 x x^2 x^3全部用P(x)表出來嗎? 04/15 22:37
推 Frobenius:∫f(x)Pn(x)dx/∫Pn(x)^2dx=(2n+1)/2∫f(x)Pn(x)dx -1~1 04/15 22:49