I&#x27;ve given up on this book at page one:<p><a href="https:&#x2F;&#x2F;archive.org&#x2F;stream&#x2F;DifferentialEquations_91&#x2F;Piaggio-DifferentialEquations#page&#x2F;n19&#x2F;mode&#x2F;2up" rel="nofollow">https:&#x2F;&#x2F;archive.org&#x2F;stream&#x2F;DifferentialEquations_91&#x2F;Piaggio-...</a>