Cantilever Beam Deflection with Concentrated Loads

[parmz_11]

hi guys was doing one of the questions sort of stuck as i don't know much about cantilever beams. I've got this question here:

Consider a cantilever beam of length L carrying concentrated masses at both of its mid-lenght and at its tip. the cantilever may be assumed to have negligible mass:
find the equation of cantilever deflection solely under a concentrated load applied at its tip as a function of a positive variable measured relative to the fixed end and also the flexibility matrix of a cantilever system equation abpve, matrix element 1,1 1,2 2,1 2,2

thanks guys

 

[radou]

What's the relation between the second derivative of deflection and the moment?