Muchos profesores y estudiantes prefieren las ediciones antiguas por razones específicas:
Finding a complete, official "solucionario" (solution manual) for the older versions of Tom Apostol's solucionario calculo tom apostol vol 1 y 2l old version
: Websites like Reddit, Stack Exchange (Math Stack Exchange, in particular), or Math Help boards might have threads or posts related to Apostol's "Calculus." Sometimes, users share resources or point to where they might be found. Stack Exchange (Math Stack Exchange