Question

Preciso de ajuda (n+1)! + n! _______ = 2n!

Answer 1

$\\ (n + 1)! + n! = 2n! \\ \\ (n+1)(n)! + n! = 2n! \\ \\ n![ (n + 1) + 1] = 2n! \\ \\ (n + 1) + 1 = 2 \\ \\ n + 2 = 2 \\ \\ n = 0$