Lynch Floyd
01/08/2024 · Elementary School
5) Montrer que pour tout \( n \geq 4 \) et \( n-4 \) est multiple de 5 , on a : \( n^{2}-1 \) est un multiple de 5
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Pour tout \( n \geq 4 \) avec \( n-4 \) multiple de 5, \( n^2 - 1 \) est aussi un multiple de 5.
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