A recursive definition for n!n!n! is n!=n⋅(n−1)!n! = n \cdot (n-1)!n!=n⋅(n−1)!. What is the domain of nnn for this definition?
n≥1n \geq 1n≥1
n>0n > 0n>0 and nnn is real
n≥0n \geq 0n≥0
n=0n = 0n=0 only