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When he realised 😂💔
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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.

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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!

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Morning subs😊

Absolute of a negative is a positive 😊👍
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By force understanding 😂😂
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