2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/73303The explicit formulas for the sums of positive powers of the integers $s_i$ unrepresentable by the triple of integers $d_1,d_2,d_3\in {\mathbb N}, \gcd(d_1,d_2,d_3)=1$, are derived.6 pagesNumber Theory11P81; 20M99text