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Sum of the series(1*1!+2*2!+3*3!+.......................................+2012*2012!)
Read Solution (Total 5)
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- 1*1!=2!-1
1*1!+2*2!=3!-1
1*1!+2*2!+3*3!=4!-1
......
(1*1!+2*2!+3*3!+............+2012*2012!)=2013!-1 - 11 years agoHelpfull: Yes(20) No(0)
- 1*1!=2!-1!
2*2!=3!-2!
:
:
2012*2012!=2013!-2012!
Adding all the above terms we get the sum as (2013!-1!). - 11 years agoHelpfull: Yes(4) No(0)
- ans is 2013!-1!
- 11 years agoHelpfull: Yes(2) No(0)
- 2013!-1 no doubt is correct one
- 11 years agoHelpfull: Yes(1) No(0)
- 1x1!=1
2x2!=4
1x1!+2x2!=5==>3!-1
similiarly
1x1!+2x2!+3x3!=23==>4!-1
hence
sum of series== 2013!-1 - 11 years agoHelpfull: Yes(1) No(0)
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