equations indexing in matlab

What is the program code for the below equations?

a0=0.5*sum(rho(j)*b(j)) for j=0 to k

0.5*sum(b(j)*(rho(abs(r-j))+rho(r+j)))=0 for j = 0 to k and r=l+1 to + l+k

                                              where l and k can be calculated

I want to solve the above equations and want to get a0,bo,b1,b2 etc how to write equations having index in matlab?please help me

[Walter Roberson]

duplicates http://www.mathworks.co.uk/matlabcentral/answers/60314-how-to-write-code-for-the-following-formulae