推 sean456:一階線性ODE 我算出來是y=x^5*e^x-x^4*e^x+x^4C 04/11 19:54
推 greymonth:I=e^∫-4/x dx = x^-4吧 04/11 19:56
推 greymonth:(x^-4)‧y = ∫(x^-4)‧(x^6 * e^x )dx 04/11 19:59
推 sean456:樓上 你X已經除掉了吧 啥還是X︿6次方? 04/11 20:00
推 shinyhaung:我跟樓上一樣用積分因子答案是 y = (x^6-2x^5+2x^4)e^x 04/11 20:00
→ greymonth:對吼 (x^-4)‧(x^"5" * e^x )dx 04/11 20:01
→ greymonth:拍謝拍謝 04/11 20:01
→ shinyhaung:對喔 我也忘了除= =" 04/11 20:01
→ sean456:而且樓上的還沒有C= = 04/11 20:01
→ shinyhaung:果然考完就忘了~ 04/11 20:02
推 squallting:我沒香蕉可以蕉你 04/11 20:42