SOLUTION: Evaluate 20!/18!

Question 74075: Evaluate 20!/18!
Answer by Edwin McCravy(20063) (Show Source): You can put this solution on YOUR website!


20!/18! =
       
 20�19�18�17�16�15�14�13�12�11�10�9�8�7�6�5�4�3�2�1
����������������������������������������������������
    18�17�16�15�14�13�12�11�10�9�8�7�6�5�4�3�2�1

Have a good time canceling:

        1  1  1  1  1  1  1  1  1 1 1 1 1 1 1 1 1 1
 20�19�18�17�16�15�14�13�12�11�10�9�8�7�6�5�4�3�2�1
����������������������������������������������������
````18�17�16�15�14�13�12�11�10�9�8�7�6�5�4�3�2�1
     1  1  1  1  1  1  1  1  1 1 1 1 1 1 1 1 1 1


                        20�19

                         380

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