2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/227128We apply the entropy function formalism to non-extremal D1D5 and D2D6NS5-branes whose throat approximation is given by the Schwarzschild black hole in AdS_3\times S^3\times T^4 and AdS_3\times S^2\times S^1\times T^4, respectively. We find the Bekenstein-Hawking entropy and the (alpha')^3R^4 corrections from the value of the entropy function at its saddle point. While the higher derivative terms have no effect on the temperature, they decrease the value of the entropy.17 Pages, Latex file; Minor additions, version published in JHEPHigh Energy Physics - Theorytext