how to loop equations

im trying to loop the equation y=l is a amount of numbers and dhm is the number = to a vector . i dont know how to make the 1/Xn loop with adding and changing the varibles. i have part of the code set up but i dont want to go d_mm1+d_mm2. Any suggestions?

d_mm=[93.2,92.7,91.8,93.6,92.8,93.1,93.8,92.4,93.4,93.1]
l=10
for k= 1:1:l;
   dhm=((l)/(1/d_mm(1,1))+
end

Answer 1

[Torsten]

denominator = sum(1./dmm);
d = l/denominator;