SOLUTION: Evaluate nP2+n+1P2
Algebra.Com
Question 1121344: Evaluate nP2+n+1P2
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
The last term is zero because you cannot choose 1 thing 2 at a time.
John
My calculator said it, I believe it, that settles it
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