問題詳情

2. yi(x) = e-2x is one solution of y'' + 4y' += 0 .To find a secondsolution , y2 by the method of Reduction of Order?y2(x) = u(x) y1(x)(25%)

參考答案

答案：B
難度：非常簡單0.951522
統計：A(281),B(6752),C(29),D(34),E(0)