kill(all)$

van=facebook.com/LearningCalculus$

'sum(2*i-3,i,1,20)=sum(2*i-3,i,1,20);

create_list(sum(i+1,i,1,n),n,1,10);

create_list(n*(n+3)/2,n,1,10);

'limit(sum(i+1,i,1,n)/n^2,n,inf)=(n*(n+3)/2)/n^2;

limit(rhs(%),n,inf);