find the sum: 1*1!+2*2!+3*3!+.....+2401*2401!

• 1(1!)+2(2!)+3(3!)......(n+1)!-1
  (2401+1)!-1
• 12 years agoHelpfull: Yes(31) No(4)
• 2402!-1
  
  since 1*1!+2*2!=3!-1
• 12 years agoHelpfull: Yes(6) No(1)
• (n+1
  
  
  
  
  
  
  
  
  
  0
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  (n+1)!-1
  
  
  
• 12 years agoHelpfull: Yes(3) No(29)
• 2405!-1
  since 1*1!+2*2!=3!-1
  similarly
• 12 years agoHelpfull: Yes(2) No(12)
• ans= 2401*2041!
  if we take 2401*2041! common we see that all factorials within the bracket are near to 0....
• 12 years agoHelpfull: Yes(0) No(12)