When he realised 😂💔
@edmathlab

There is no factorial of a negative number 😊👍

A factorial (denoted by !) is the product of all positive whole numbers less than or equal to a given number, calculated as n!=n× (n-1)×....× 2×1, used primarily in combinatorics to find permutations (arrangements) of items, with 0! is defined as 1. For example, 4! is
4×3 ×2 ×1 =24.

@edmathlab

Factorials of negative integers are generally undefined in standard mathematics because the defining formula n!=n× (n-1)! leads to a division by zero (e.g., (-1)!=0!÷0. While the Gamma function, Gamma (n+1)=n!, extends factorials to complex numbers, it becomes infinite at negative integers. Some contexts, however, may define them using extended formulas, such as (-n)!=(-1)^{n}n!

@edmathlab

Take note
We are all learning 😌👍

Morning subs😊

Absolute of a negative is a positive 😊👍
@edmathlab

By force understanding 😂😂
@edmathslab

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@edmathlab

The absolute value | x | of a real number x is the non-negative value of x without regard to its sign. For example, the absolute value of 5 is 5, and the absolute value of −5 is also 5. The absolute value of a number may be thought of as its distance from zero along real number line.

@edmathlab