1*1! + 2*2! +3*3! +.......... +2012*2012!

• 2013!-1
  1*1!=1(2!-1)
  2*2!=4+1=5(3!-1)
  3*3!=18+5=23(4!-1)
  similarly
  1*1!+2*2!+.....+2012*2012!=2013!-1
  
• 11 years agoHelpfull: Yes(17) No(0)
• Ans : 2013!-1
  its a formula (N+1)!-1
  where N=last integer
• 11 years agoHelpfull: Yes(4) No(0)
• the ans is 2013!-1
  1!+2*2!+3*3!=4!-1..............so on.....
  
• 11 years agoHelpfull: Yes(0) No(0)
• 2013!-1 will be the answer !!!
• 11 years agoHelpfull: Yes(0) No(0)