9000140510

SubArea: 
Combinatorics
Level: 
B
Project ID: 
9000140510
Accepted: 
1
Clonable: 
0
Easy: 
0
Find the solution set of the equation assuming \(x\in \mathbb{N}\). \[ (x + 1)! + x! = 6x + 12 \]
\(\{3\}\)
\(\{2\}\)
\(\{1\}\)
\(\{4\}\)