in a sequence of integers, A(n)=A(n-1)-A(n-2) where A(n) is the nth term in the sequence, n is an integer and n>=3, where s(1000)is the sum of the first 1000 terms

• s(1000)=1
  A(1)=1
  A(2)=1
  A(3)=0
  A(4)=-1
  A(5)=-1
  A(6)=0
  A(7)=1
  so series is 1 1 0 -1 -1 0 1 1 0 -1 -1 0..........
  so this series will repeat after every 6 terms.
  sum of first 6 terms is 0.
  1000 mod 6 = 4
  last four terms will be 1 1 0 -1
  whose sum is = 1
  so s(1000) = 1
• 12 years agoHelpfull: Yes(1) No(0)
• let the amount of milk be 5xl litres and water be x litres. then 5x+x=66. so, x=11. so, there is 55 litres milk and 11 litres water. now let y litres of water be added. then 55/(11+x)=3/5. so, x=22. so, ans is 22 litres.
• 12 years agoHelpfull: Yes(0) No(1)
• that will be 3....
  
• 12 years agoHelpfull: Yes(0) No(2)