Stefani_problem_stefani_problem May 2026

Directly building an example that satisfies the property.

∑i=1nfi2=fnfn+1sum from i equals 1 to n of f sub i squared equals f sub n f sub n plus 1 end-sub Step-by-Step Induction Proof .The base case holds. Inductive Step: Assume the formula holds for . We must show it holds for stefani_problem_stefani_problem

Finding a single case where a statement fails to disprove it. 3. Application: The Fibonacci Identity Directly building an example that satisfies the property

Assuming the property is false and showing this leads to an impossibility. Contraposition: Proving "If not B, then not A." then not A."