
https://www.questionsolutions.com/wp-content/uploads/2017/11/p3.9-2v1.png
https://www.questionsolutions.com/wp-content/uploads/2017/11/p3.9v1.png
https://www.questionsolutions.com/wp-content/uploads/2017/11/p3.9-3v3.png
Image from: J. D. Irwin and R. M. Nelms, Basic engineering circuit analysis, 10th ed. Hoboken, NJ: John Wiley, 2011.
Excelente