- Factorial, but with addition - Mathematics Stack Exchange
Factorial, but with addition [duplicate] Ask Question Asked 11 years, 6 months ago Modified 5 years, 10 months ago
- What does the factorial of a negative number signify?
So, basically, factorial gives us the arrangements Now, the question is why do we need to know the factorial of a negative number?, let's say -5 How can we imagine that there are -5 seats, and we need to arrange it? Something, which doesn't exist shouldn't have an arrangement right? Can someone please throw some light on it?
- Any shortcut to calculate factorial of a number (Without calculator or . . .
12 I've been searching the internet for quite a while now to find anything useful that could help me to figure out how to calculate factorial of a certain number without using calculator but no luck whatsoever
- Can the factorial function be written as a sum?
Here's a good reference document from a few years back: Factorials as sums by Roberto Anglani and Margherita Barile In this paper we give an additive representation of the factorial, which can be proven by a simple quick analytical argument We also present some generalizations, which are linked, on the one hand to an arithmetical theorem proven by Euler (decomposition of primes as the sum of
- An easier method to calculate factorials? - Mathematics Stack Exchange
To find the factorial of a number, n n, you need to multiply n n by every number that comes before it For example, if n = 4 n = 4, then n! = 24 n! = 24 since 4 ⋅ 3 ⋅ 2 ⋅ 1 = 24 4 ⋅ 3 ⋅ 2 ⋅ 1 = 24 However, this method is very time consuming and, as n n gets larger, this method also become more difficult, so is there an easier method that I can use to find the factorial of any number?
- How to find the factorial of a fraction? - Mathematics Stack Exchange
Moreover, they start getting the factorial of negative numbers, like −12! = π−−√ − 1 2! = π How is this possible? What is the definition of the factorial of a fraction? What about negative numbers? I tried researching it on Wikipedia and such, but there doesn't seem to be a clear-cut answer
- How do we calculate factorials for numbers with decimal places?
I was playing with my calculator when I tried $1 5!$ It came out to be $1 32934038817$ Now my question is that isn't factorial for natural numbers only? Like $2!$ is $2\\times1$, but how do we e
- Factorial number of digits - Mathematics Stack Exchange
Is there any neat way to solve how many digits the number $20!$ have? I'm looking a solution which does not use computers, calculators nor log tables, just pen and paper
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