Find the general solution for xy"+y'=0 Find the general solution of y"+4y+2y=0 Solve by the method of Cauchy-Euler 2y"+y'-3y=0, y(0)-a, y'(0)=b Get a particular solution por y"+2y=e^x+x^3 And get a general solution for y-y-c+y-p Solve by the method of Cauchy-Euler y"+2y+y=x^2, y(0)= 1, y'(0)=2 Use a variation of parameters to get a particular solution of y"-y=1/(e^x+e^-x)