Question Number 166112 by mathls last updated on 13/Feb/22
$${prove}\:{that}\:\mathrm{0}!=\mathrm{1} \\ $$
Commented by mathls last updated on 13/Feb/22
$$? \\ $$
Answered by satyam123 last updated on 13/Feb/22
$${by}\:{defnition}, \\ $$$${n}!={n}.\left({n}ā\mathrm{1}\right)! \\ $$$${Put}\:{n}=\mathrm{1} \\ $$$$\mathrm{1}!=\mathrm{1}.\mathrm{0}! \\ $$$$\mathrm{0}!=\mathrm{1} \\ $$