Factorial of -2

The factorial of a number is denoted by an exclamation mark (!) after it.

If n is a non-negative integer, then: n! = n × (n - 1) × (n - 2) × ... × 3 × 2 × 1

However, factorials are not defined for negative numbers in standard arithmetic.

Therefore, the factorial of -2 is undefined.

• Factorial: The process of multiplying a number by all the natural numbers smaller than itself. It is denoted by an exclamation mark (!). However, it is defined only for non-negative integers.

• Undefined: A term used in mathematics to indicate that a particular operation or expression does not have a valid result.

• Non-negative integers: Whole numbers that are greater than or equal to zero (0, 1, 2, 3, ...).

• Natural numbers: Counting numbers starting from 1, 2, 3, and so on. Note that this does not include zero or negative numbers.

• Mathematical function: A relation that uniquely associates members of one set with members of another set, often represented by formulas or equations. In this context, the factorial is a function applied to non-negative integers.