SOLUTION: 2n! divided by (n-3)! = 84n

Question 1021025: 2n!
divided by
(n-3)!
= 84n

Answer by Edwin McCravy(20055) (Show Source): You can put this solution on YOUR website!
2n! divided by (n-3)! = 84n













The left side is a factorial.
For the right side to be a factorial beginning
with 7*6, it must be 7! or 7*6*5*4*3*2*1.
Then (n-3)! must be 5*4*3*2*1 or 5!

Therefore







Checking:











So it checks:

Solution: 

Edwin

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