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Calculations with factorials

In arithmetic with factorials you must pay attention to the rules.

 


Explanation

Sometimes you can easily multiplicate factorials

In a division you will find this again

and that is not a surprise.

 


Example 1

The calculation of the power series for the number e shows how it works

The development of the binomium gives

The first term gives

The second term gives

The third term gives

The fourth term gives

After resolving all terms you get

 


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