|贴子

2021-11-01
求助，方程求解不了，刚学mathematica吧
\!\(\* TagBox[ RowBox[{"etama", "=", RowBox[{"ArcCos&qu...
2021-10-31
求助，微分方程求解不了mathematica吧
DSolve[{E1*A1*W1''[Z] + \[Rho]*A1*\[Omega]^2*W1[Z]^2 == 0, E1*J*U1...