Question

fill in the blank to write this product as a factorial. 5·4·3·2·1 = ?!

Explanation:

Step1: Recall factorial definition

The factorial of a non - negative integer $n$, denoted by $n!$, is the product of all positive integers less than or equal to $n$. That is $n!=n\times(n - 1)\times\cdots\times1$.

Step2: Identify the number

In the product $5\times4\times3\times2\times1$, the largest number in the product is 5. By the definition of factorial, $5\times4\times3\times2\times1 = 5!$.

Answer:

5