2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49868We continue our study of gravity described by the action density (-g)^(1/2)(R_ik^2+bR^2); and look for cosmological solutions of gravity coupled to dust, for the closed isotropic model. There is a solution that at t approaches zero has for the radius, a(t)=t/3^(1/2); in the absence of dust this solution holds for all time.3 pages, LaTeXHigh Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext