討論串[理工] ODE
共 22 篇文章
內容預覽:
各位強者們我不懂這題的意思,一直解不出來. Under the variable transformation y=-xu'/u x>0. can you derive the corresponding second order differential for u(x). what's the
(還有43個字)
內容預覽:
4x y'' + 2y' + y = 0. 2 1 1. x y'' + ── x y' + ── x y = 0. 2 4. 1 1 α. 1 - 2 α = ── , α = ── , Let y(x) = x z(x). 2 4. 2 x 2. => x z'' + x z + (── - α
(還有118個字)