2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77426A theorem of Mina evaluates the determinant of a matrix with entries $D^j(f(x)^i)$. We note the important special case where the matrix entries are evaluated at $x=0$ and give a simple proof of it, and some applications. We then give a short proof of the general case.5 pages, LaTeX2e sourceCombinatoricsRings and Algebras05A19; 15A15text