Thank you very much for your quick answer. The things is that we are first year in uni, we did only 4 lessons in maple and we stopping it (we are starting matlab next semester)...Many of the commands you wrote are unknown for us but many many thanks again! The thing is that when I solved the diff. equation with the initial condition, I had two solutions which were Rootof(something complicated with ln, arctan and I, thus complex xolutios(!))..Maybe that's why you wrote me to assume that it's real. With E=1 and y(0)=0, again our solutions are infinite? The equation after applying the initial condition wouldn't normally have two solutions?? (because of the degree 2?)

Thanks again!

Thank you very much for your quick answer. The things is that we are first year in uni, we did only 4 lessons in maple and we stopping it (we are starting matlab next semester)...Many of the commands you wrote are unknown for us but many many thanks again! The thing is that when I solved the diff. equation with the initial condition, I had two solutions which were Rootof(something complicated with ln, arctan and I, thus complex xolutios(!))..Maybe that's why you wrote me to assume that it's real. With E=1 and y(0)=0, again our solutions are infinite? The equation after applying the initial condition wouldn't normally have two solutions?? (because of the degree 2?)

Thanks again!