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What does 10 factorial mean?

What is a factorial of 10? The value of factorial of 10 is 3628800, i.e. 10! = 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 3628800.

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Factorial

In Mathematics, factorial is an important function, which is used to find how many ways things can be arranged or the ordered set of numbers. The well known interpolating function of the factorial function was discovered by Daniel Bernoulli. The factorial concept is used in many mathematical concepts such as probability, permutations and combinations, sequences and series, etc. In short, a factorial is a function that multiplies a number by every number below it till 1. For example, the factorial of 3 represents the multiplication of numbers 3, 2, 1, i.e. 3! = 3 × 2 × 1 and is equal to 6. In this article, you will learn the mathematical definition of the factorial, its notation, formula, examples and so on in detail.

Also, Check: Factorial Calculator

What is Factorial?

In Mathematics, factorial is a simple thing. Factorials are just products. An exclamation mark indicates the factorial. Factorial is a multiplication operation of natural numbers with all the natural numbers that are less than it. In this article, let’s discuss the factorial definition, formula and examples.

Factorial Notation

The multiplication of all positive integers, say “n”, that will be smaller than or equivalent to n is known as the factorial. The factorial of a positive integer is represented by the symbol “n!”.

Factorial Formula

The formula to find the factorial of a number is

n! = n × (n-1) × (n-2) × (n-3) × ….× 3 × 2 × 1 For an integer n ≥ 1, the factorial representation in terms of pi product notation is:

(egin{array}{l}n! = prod_{i=1}^{n}iend{array} )

From the above formulas, the recurrence relation for the factorial of a number is defined as the product of the factorial number and factorial of that number minus 1. It is given by:

n! = n. (n-1) !

Factorial of a Number

To find the factorial of any given number, substitute the value for n in the above given formula. The expansion of the formula gives the numbers to be multiplied together to get the factorial of the number.

Factorial of 10

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For example, the factorial of 10 is written as

10! = 10. 9 !

10! = 10 (9 × 8 × 7 × 6 × 5× 4 × 3 × 2 × 1)

10! = 10 (362,880)

10! = 3,628,800

Therefore, the value of 10 factorial is 3,628,800

The factorial operation is encountered in many areas of Mathematics such as algebra, permutation and combination, and mathematical analysis. Its primary use is to count “n” possible distinct objects. For example, the number of ways in which 4 persons can be seated in a row can be found using the factorial. That means, the factorial of 4 gives the required number of ways, i.e. 4! = 4 × 3 × 2 × 1 = 24. Hence, 4 persons can be seated in a row in 24 ways.

Factorials of Numbers 1 to 10 Table

The list of factorial values from 1 to 10 are:

n Factorial of a Number n! Expansion Value 1 1! 1 1 2 2! 2 × 1 2 3 3! 3 × 2 × 1 6 4 4! 4 × 3 × 2 × 1 24 5 5! 5 × 4 × 3 × 2 × 1 120 6 6! 6 × 5 × 4 × 3 × 2 × 1 720 7 7! 7 × 6 × 5 × 4 × 3 × 2 × 1 5,040 8 8! 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 40,320 9 9! 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 362,880 10 10! 10 × 9 ×8 × 7 × 6 × 5 ×4 × 3 × 2 × 1 3,628,800

What is Sub factorial of a Number?

A mathematical term “sub-factorial”, defined by the term “!n”, is defined as the number of rearrangements of n objects. It means that the number of permutations of n objects so that no object stands in its original position. The formula to calculate the sub-factorial of a number is given by:

(egin{array}{l}!n = n!sum_{k=0}^{n}frac{(-1)^{k}}{k!}end{array} )

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Factorial of 5

Finding the factorial of 5 is quite simple and easy. This can be found using formula and expansion of numbers. This is given below with detailed steps.

We know that,

n! = 1 × 2 × 3 …… × n

Factorial of 5 can be calculated as:

5! = 1 × 2 × 3 × 4 × 5

5! = 120

Therefore, the value of factorial of 5 is 120.

Video Lesson

Exponent of Prime in Factorial Factorial Examples Example 1: What is the factorial of 6? Solution: We know that the factorial formula is n! = n × (n – 1) × (n – 2) × (n – 3) × ….× 3 × 2 × 1 So the factorial of 6 is 6! = 6 × (6 -1) × (6 – 2) × (6 – 3) × (6 – 4) × 1 6! = 6 × 5 × 4 × 3 × 2 ×1 6! = 720 Therefore, the factorial of 6 is 720. Example 2: What is the factorial of 0? Solution: The factorial of 0 is 1 i.e., 0 ! = 1 According to the convention of empty product, the result of multiplying no factors is a nullary product. It means that the convention is equal to the multiplicative identity. Practice Problems Practice the problems given below to understand the concept. Evaluate 7! – 5!. What is the value of 12!/(10! 4!) If (1/6!) = (x/8!) – (1/7!), then what is the value of x? Is 4! + 5! = 9!? Visit BYJU’S – The Learning App for more information on factorial of numbers and explore Maths-related videos to learn with ease.

byjus.com - What is Factorial? - Factorial Function in Maths - Byju's
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