how to prove 0!=1

• we know that n!=1*2*3...*(n-1)*n
  n!=(n-1)!*n
  n!/(n-1)!=n
  put n=1
  1!/0!=1
  0!=1!/1=1
  Thus proved
  
• 10 years agoHelpfull: Yes(11) No(0)
• we know n!=1*2*-------*n
  =>n!=1*2*-------*(n-)*n
  =>n!=(n-1)!*n
  put n=1
  then 1=0!*1
  or 0!=1
• 10 years agoHelpfull: Yes(1) No(0)