1.

The factorial of a positive integer n is nι =

A. n(n-1)(n-2)(n-3)…3.2.1
B. (n-1)(n-2)(n-3)…3.2.1
C. (n-1)n(n-1)(n-2)(n-3)…3.2.1
D. (n-2)(n-3)…3.2.1
Answer» B. (n-1)(n-2)(n-3)…3.2.1


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