Question

calcule o valor de n em (n+1) ! = 120?

Answer 1

$120=5 \times 4 \times 3 \times 2 \times1\\ \\ 120=5!\\ \\ \\ \left(n+1 \right )!=120\\ \\ \left(n+1 \right )!=5!\\ \\ n+1=5\\ \\ n=5-1\\ \\ \boxed{n=4}$