1(1!)+2(2!)+3(3!)....2012(2012!)

• 1(1!)=1 --->2!-1
  1(1!)+2(2!)=1+4=5 --->3!-1
  1(1!)+2(2!)+3(3!)=1+4+18=23--->4!-1
  -
  -similarly
  1(1!)+2(2!)+3(3!)+........+2012(2012!)=2013!-1
• 11 years agoHelpfull: Yes(41) No(0)
• 1(1!)=1 --->2!-1
  1(1!)+2(2!)=1+4=5 --->3!-1
  1(1!)=2!-1!
  2(2!)=3!-2!
  and so on ...
  2012(2012!)=2013!-2012!
  adding all
  and this will lead ans>> 2013! - 1!
• 11 years agoHelpfull: Yes(3) No(0)
• i think (2013!-1)
• 11 years agoHelpfull: Yes(2) No(1)
• i think that ans is (2013!-1)
  
• 11 years agoHelpfull: Yes(1) No(0)