For decades, Earl W. Swokowski’s Calculus with Analytic Geometry (translated into Portuguese as Calculo com Geometria Analitica ) has been a cornerstone of undergraduate mathematics education. The phrase represents a specific search intent: students who have access to a PDF version of the book but need help with the exercises (trabalho) —the homework problems, solutions, and conceptual understanding.

: Many students seek the Classic Edition (5th or 6th Edition) , which is highly regarded for its clear explanations and balanced approach between theory and application. Finding "Work" and Solution Manuals (PDF)

Swokowski includes this exact problem. The requires you to change the perimeter value.