Math Problem Statement
Soit n ∈ N*.Démontrer que si (n² − 1) n’est pas divisible par 8, alors n est pair.
Solution
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Math Problem Analysis
Mathematical Concepts
Number Theory
Divisibility
Parity (Even and Odd Numbers)
Contrapositive Proof
Formulas
n^2 - 1 = (2k + 1)^2 - 1 = 4(k^2 + k)
k^2 + k = k(k + 1)
Theorems
Properties of Consecutive Integers
Divisibility by 8 in Quadratic Forms
Suitable Grade Level
Grades 10-12
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