What is $n!$ in terms of $(n-1)!$ (for $n \geq 1$)?
A$n + (n-1)!$
B$(n-1)!^2$
C$n \cdot (n-1)!$
D$(n-1)! / n$
Answer & Solution
Correct answer: C. $n \cdot (n-1)!$
$n! = n \cdot (n-1)!$ — the recursive definition.
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