Can formulation (sum(affine/concave) < constant) be transformed to a convex expression?

[Mark_L_Stone]

cvx_begin
N = 5;
variables a(N) V_slack(N)
objective = 0;
for n=1:N
  objective = objective + quad_over_lin(a(n),V_slack(n));
end
minimize(objective)
cvx_end

[TomK (L)]

OK，thanks！