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Numerical Ability
Number System
A(n) is a function where A(0)=1,A(1)=1,A(2)=2 so find the S(1000)..Here S means sum of thousand terms?
Read Solution (Total 4)
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- series is 1 1 2 3 4 5......999
1+sum(1+2+3+.....+999)
1+((999/2)(1+999))=499501
- 9 years agoHelpfull: Yes(31) No(0)
- (999*1000/2)+1=499501
- 9 years agoHelpfull: Yes(4) No(0)
- A might be factorial function, too
coz, 0! =1
1! = 1
2! = 2
S(1000) = 0! + 1!+ 2! +.......+ 999! - 9 years agoHelpfull: Yes(4) No(3)
- sum of 1 to n -> n(n+1)/2
then,
(1001*1002)/2= 501501 - 9 years agoHelpfull: Yes(2) No(6)
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