SUMMARY
For any natural number n greater than 1, n! (factorial of n) is always even due to the presence of 2 as a factor. Consequently, when 1 is added to an even number, the result is odd. Therefore, it is established that n! + 1 is odd for all n ∈ ℕ where n > 1.
PREREQUISITES
- Understanding of natural numbers (ℕ)
- Knowledge of factorial notation (n!)
- Basic properties of even and odd numbers
- Familiarity with mathematical proofs and logical reasoning
NEXT STEPS
- Study the properties of factorials in combinatorics
- Explore the concept of parity in number theory
- Learn about mathematical induction for proving statements
- Investigate the implications of even and odd functions in mathematics
USEFUL FOR
Mathematics students, educators, and anyone interested in number theory and mathematical proofs.