Chapter 11.6, Problem 2C

To determine

To calculate: the factorial $5!$ .

Answer to Problem 2C

The value of factorial $5!$ is $120$ .

Explanation of Solution

Given : the number is $5!$ provided in the question,

Formula used:

  $n!=n(n-1)(n-2)\mathrm{......1}$

Calculation : toevaluate the $5!$ , put $n=6$ in the formula then multiply it.

  $\begin{array}{l}n!=n(n-1)(n-2)\mathrm{......1}\\ 5!=5·4·3·2·1\text{ [substitue n by 5]}\\ 5!=120\text{ [multiply]}\\ \end{array}$

Hence,The value of factorial $5!$ is $120$ .