Question

Let n! = 1 x 2 x 3 x 4 x ... x n for integer n 2 1. What could be the value of 1! + (2 x 2!)
+ (3 x 3!) + (4 x 4!) + (10 x 10!)?
1) 11 x 11!
2) 11!
3) 11! - 1
4) 11! + 1​

Answer 1

okokokok

4) 11! + 1

4 is anwer