given the 3rd order differential equation: y''' - 3y'' + 2y' =
ex / (1 + e-x)
i) set u = y' to reduce the order of the equation to order 2
ii) solve the reduced equation using variation of parameters
iii) find the solution of the original differential equation
find the general solution of the given differential
equation.
1. y'' + y = tan t, 0 < t < π/2
2. y'' + 4y' + 4y = t-2 e-2t , t >
0
find the solution of the given initial value problem.
3. y'' + y' − 2y = 2t, y(0) = 0, y'(0) = 1