2006-09-22 15:43:12 · 17 answers · asked by pralok t 1 in Science & Mathematics ➔ Mathematics
factorial
n! = n*(n-1)*(n-2)*...*2*1, so n factorial means the you start with n and you multiply each number lower than n together until you get to 1. 0! is defined to be 1. So
0! = 1
1! = 1
2! = 2*1 = 2
3! = 3*2*1 = 6
4! = 4*3*2*1 = 24
And so on.
2006-09-22 15:48:36 · answer #1 · answered by blahb31 6 · 1⤊ 0⤋
Factorial. 3! means 3 x 2 x 1
2006-09-22 15:46:31 · answer #2 · answered by Diane D 5 · 0⤊ 0⤋
5! = 5 "factorial" = 5 x 4 x 3 x 2 x 1 = 120
2006-09-22 16:53:11 · answer #3 · answered by Anonymous · 0⤊ 0⤋
everyone answered it right.
Factorial is denoted ! and tends to occur in probability.
To find the factorial of a number manually, you need to perform a kind of countdown.
Starting with your number, count down to one by whole numbers.
Then multiply all these values together.
The result is the factorial of the original number.
Example
5!=5*4*3*2*1
The most common use of the factorial is which determines the number of possible ways of choosing r objects from a group of objects.
The formula for n C r is n!/ (r!(n-r)!)so in the case of the Lotto we have:
5 C 2 = 5! / 2! * 3! =5*4*3*2*1 / 2*3*2 = 10
We can now do lots of cancelling as many figures appear on the top as well as on the bottom…
Hence there are nearly 10 possible combinations of 2 balls that can be drawn from a total of 5.
2006-09-22 16:33:33 · answer #4 · answered by chdman 3 · 0⤊ 0⤋
The symbol "!" mean 'factorials'...
Whent this symbol appears so you have to multiply the nos like this:
Eg:- 5! = 1*2*3*4*5 = 120
6! = 1*2*3*4*5*6 = 720
1! = 1
2! = 1*2 = 2
Hope that helps
deepak
2006-09-22 15:50:16 · answer #5 · answered by Deepak A 2 · 0⤊ 0⤋
"I" means 'Factorial' in mathematics.
You'll understand it better from the following examples:
1! = 1
2! = 2 x 1
3! = 3 x 2 x1
4! = 4 x 3 x 2 x 1
5! = 5 x 4 x 3 x 2 x 1
.
.
.
Like wise...
n! = n x (n-1) x (n-2) x (n-3) x ...... x 3 x 2 x 1
There is one important result to be noted...
0! is not 0 but 1.
i.e. 0! = 1 and not 0
2006-09-22 16:15:44 · answer #6 · answered by Anith 1 · 0⤊ 0⤋
Factoral. Example: 9!, means, 9*8*7*6*5*4*3*2*1=362,880
2006-09-22 15:47:03 · answer #7 · answered by Anonymous · 0⤊ 0⤋
"!" mean = 'factorial'
Whenever this symbol appears you are required to multiple the numbers up to 1 from that number
For Instance = 7! means
7*6*5*4*3*2*1 = 5040
2006-09-22 22:20:17 · answer #8 · answered by c2 brahmin 2 · 0⤊ 0⤋
Factorial. In mathematics, the factorial of a natural number n is the product of all positive integers less than or equal to n. This is written as n! and pronounced "n factorial".
2006-09-22 20:04:46 · answer #9 · answered by Mohammed F 1 · 0⤊ 0⤋
Factorial!
4!=4x3x2x1
3!=3x2x1
2!=2x1
Similarily,
4!/3!= (4x3x2x1) / (3x2x1)
=4
2006-09-22 17:44:14 · answer #10 · answered by Brendan R 4 · 0⤊ 0⤋