How can I express this concave function in CVX

[alireza1375 (Alireza)]

very thank you sir
your guide and this link was usefull

Harmonic mean in cvx

We know harmonic mean is concave on the positive side. Is there any way to feed this function to cvx?

and log is increasing function

i wrote this code then and solved

clear all;close all;clc
N = 10;
g = 1;
h = 1;
r = 1;
ObjValue = zeros(4,1);
for i = 1 : N
cvx_begin
    variable x nonnegative
    variable y nonnegative
    minimize inv_pos(h*y)+inv_pos(g*x)
    subject to
    x + y == Pt
cvx_end

    if ~exist('f', 'var') || isempty(f) 
        f = log2(1+1/cvx_optval);
    else
        f = [f,log2(1+1/cvx_optval)];
    end
end
ObjValue(r) = sum(f);