History of 7.2.10

Revisions on September 15, 2026

• Edit to “Solution”

  Valter Sep 15, 2026, 8:54 PM
  +1 −1 #20764
• Edits to “Problem”, “Note: Why is the answer in the textbook ”

  Valter Sep 15, 2026, 7:10 PM
  +1 −11 #20761
• New solutionnew solution

  Valter Sep 15, 2026, 7:09 PM
  +85 −0 #20759