Factorial
Factorial
Factorial
The continued product of first n natural numbers is called the "n factorial" and is denoted by n!
i.e. n! = 1 X 2 X 3 X 4 X ... X ( n- 1) X n.
Thus, 3! = 1 X 2 X 3 = 6;
4! = 1 X 2 X 3 X 4 = 24,
5! = 1 X 2 X 3 X 4 X 5 = 120 etc.
Clearly, n! is defined for positive integers only.
Zero Factorial:
To find factorial of 0 We can multiply the integers from 1 to zero because multiplication of 0 is not defined.
So, we define 0! = 1.
Factorial of proper fractions or negative integers are not defined.
Hence we can say that factorial n is defined only for whole numbers.
n! = 1 X 2 X 3 X 4... X (n - 1) X n
n! = [ 1 X 2 X 3 X 4...X (n - 1)] X n
n! = [( n- 1)!] n = n X ( n - 1) !
Thus, n! = n X ( n - 1) !
For example,
Compute the factorial of 6 | |||
| Right Option : C | |||
| View Explanation | |||
Compute factorial of 9 | |||
| Right Option : B | |||
| View Explanation | |||
Compute the expression | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [20]
My experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
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Cheshta
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Eshan Arora
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Manya
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Manish Kumar
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Archit Segal
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Ayan Ghosh
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Aman Kumar Shrivastava
10thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
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Om Umang
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