Question

o valor da expressao (n+1)+(n-1)!/n! é: (fatorial)

Answer 1

$\dfrac{(n + 1)! + (n - 1)!}{n!} \\ \\ \\ \dfrac{x! (x + 1)+ \dfrac{x!}{x}}{x!} \\ \\ \\ \dfrac{x! (x^2 + x + 1)}{ \dfrac{x}{x!} } \\ \\ \\=> \dfrac{x^2 + x + 1}{x}$