Author Topic: Problem 1 Variant C&D 2018F  (Read 278 times)

Jing Yang

  • Newbie
  • *
  • Posts: 2
  • Karma: 0
    • View Profile
Problem 1 Variant C&D 2018F
« on: October 14, 2020, 05:08:58 AM »
Are the last steps typos? Those are true if ln(a-b)=-ln(a+b). But I don't think the equation is true. Can anyone help me with that?