why 0! is one. and what the actual defination of factorial how it can be justified that 1! is also one.
anil , 8 Years ago
Grade 12th pass
Algebra> why 0! is one. and what the actual defina...
1 Answers
Vijay Mukati
Last Activity: 8 Years ago
Since, n! = n (n-1)!, so from here for n = 1, 1! = 1 * 0! and thus 0! = 1.
Thanks, Vj
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