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As we know that the formula of

n!=n(n-1)!

so 8!=8*(8-1)!

=8*7!

=8*7*6!

=8*7*6*5!

=8*7*6*5*4!

=8*7*6*5*4*3!

=8*7*6*5*4*3*2!

=8*7*6*5*4*3*2*1!

=8*7*6*5*4*3*2*1

=40320

so the factorial of the given no. 8 is 40320.

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14y ago
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Q: What is factorial 8 in regular expression?
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