Changes

:Substituting number from step 2 for the mass of galaxy resulting in

:Substituting number from step 2 for the mass of galaxy resulting in

   

   

:<math>F_{shell}(r)=(4\pi G\rho/c^2)[E_o-E_d(r)]dr</math>.

::<math>F_{shell}(r)=(4\pi G\rho/c^2)[E_o-E_d(r)]dr</math>.

:and

:and

:<math>F_{shell}(r)=-dE_{shell}(r)/dr</math>.

::<math>F_{shell}(r)=-dE_{shell}(r)/dr</math>.

:and so

:and so

:<math>-dE_{shell}(r)/dr=(4\pi G\rho/c^2)[E_o-E_d(r)]dr</math>.

::<math>-dE_{shell}(r)/dr=(4\pi G\rho/c^2)[E_o-E_d(r)]dr</math>.

==== Step 4. Integrating both sides of above equation ====

==== Step 4. Integrating both sides of above equation ====