MatemáticasBásico1 respuestas

N(n - 1)?

N(n - 1)! + (n + 1)! + (n - 1)! = kn(n)! (1 + 1 / n)2.

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Solución : n(n - 1)! + (n + 1)! + (n - 1)! = kn(n)! (1 + 1 / n)² n(n - 1)! + (n + 1)n(n - 1)! + (n - 1)! = kn(n)(n - 1)! ((n + 1) / n)² n + (n + 1)n + 1 = kn(n)((n + 1) / n)² n + n² + n + 1 = kn²(n + 1)² / n² n² + 2n + 1 = k(n + 1)² (n + 1)² = k(n + 1)² 1 = k k = 1.

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Mrkzvega2258
3

Solución :

n(n - 1)!

+ (n + 1)!

+ (n - 1)!

= kn(n)!

(1 + 1 / n)²

n(n - 1)!

+ (n + 1)n(n - 1)!

+ (n - 1)!

= kn(n)(n - 1)!

((n + 1) / n)²

n + (n + 1)n + 1 = kn(n)((n + 1) / n)²

n + n² + n + 1 = kn²(n + 1)² / n²

n² + 2n + 1 = k(n + 1)²

(n + 1)² = k(n + 1)²

1 = k

k = 1.