You can
put this solution on YOUR website!
It can't be a very large number since the right side
would be tremendously larger than the right side if n
were large. So let's try n=1
1! * (1+2)! = (2∙1)!
1 * 3! = (2)!
1 * 6 = 2
6 = 2
No, that's false. So let's try n=2
2! * (2+2)! = (2∙2)!
2 * 4! = 4!
2 * 24 = 24
48 = 24
No, that's false. So let's try n=3
3! * (3+2)! = (2∙3)!
6 * 5! = 6!
6 * 120 = 720
720 = 720
Yes, that's true! So n=3.
Edwin
