SOLUTION: Solve this: 12(nC2) = n!

Question 920295: Solve this:
12(nC2) = n!
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!







Multiply both sides by 2!(n-2)!



Divide both side by n!



Substitute 2! = 2*1 = 2



Divide both side by 2







Take the "anti-factorial" of both sides



  <---answer!

Checking:






Edwin

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