Let G = (V, E) be a simple connected graph with vertex set V(G) and edge set E(G) .
The second GA and (Sz)_x indices a graph G are defined as sum of square rote of n_un_v over n_u+n_v and Szeged_x is defined as sum of (n_un_v)^x where nu(e) is the number of vertices closer to u than v and nv(e) is the number of
vertices closer to v than u. In this paper, some relations between the second GA index,
(Sz)_-1 and (Sz)_-1/2 of G are studied.
