For this case we have that the factorial of a positive integer "n" is defined as, the product of all the positive integers from n to reach 1.
Example:
[tex]4! = 4 * 3 * 2 * 1 = 24[/tex]
In this case we have the following expression:
[tex]73![/tex]
So, we have:
[tex]73! = 73 * 72 * 71 * 70 * ... * 3 * 2 * 1[/tex]
So, the last digit is 1.
Answer:
the last digit is 1.
