Need help with dsolving this equation ><
I am new to Mathematica and not sure what went wrong with my input.
Do not post code as an image. Put in the actual code or a notebook.Please read the rules of the forum: http://wolfr.am/READ-1ST
The derivative of a function is not written as F[R]', but as either F'[R] or D[F[R],R].
You do not have to specify
$$ F1[R]=c1 F1[R]+C2 F2[R] $$
Your definition for eqn already has the ==0