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Chapter 8: Problem 71

Explain how to find \(n !\) if \(n\) is a positive integer.

Short Answer

Expert verified
The factorial of a positive integer \(n\), denoted by \(n!\), is the product of all positive integers less than or equal to \(n\). For 0 and 1, the factorial is 1. The factorial can be found by starting from 1 and multiplying all integers up to \(n\).

Step by step solution

01

Understanding Factorial

The factorial of a positive integer \(n\) is denoted by \(n!\) and is the product of all positive integers less than or equal to \(n\). In other words: \(n! = n \times (n-1) \times (n-2) \times \ldots \times 2 \times 1\)
02

Special Cases

For the numbers 0 and 1, the factorial is defined as 1. That means \(0!\) and \(1!\) = 1.
03

Finding Factorial

To find the factorial of any positive integer \(n\), start from 1 and multiply all integers up to \(n\). For example, if \(n = 5\), then \(5! = 5 \times 4 \times 3 \times 2 \times 1 = 120 \).

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