Which of these is the recursive definition of n!n!n!?
f(n)=n⋅f(n−1),f(1)=1f(n) = n \cdot f(n-1), f(1) = 1f(n)=n⋅f(n−1),f(1)=1
f(n)=n+f(n−1),f(1)=1f(n) = n + f(n-1), f(1) = 1f(n)=n+f(n−1),f(1)=1
f(n)=f(n−1)n,f(1)=1f(n) = f(n-1)^n, f(1) = 1f(n)=f(n−1)n,f(1)=1
f(n)=f(n−1),f(1)=1f(n) = f(n-1), f(1) = 1f(n)=f(n−1),f(1)=1