8,7,5,2,-2,....find 8th term of this sequence

• 8,7,5,2,-2,...
  
  8-1=7
  7-2=5
  5-3=2
  2-4=-2
  -2-5=-7
  -7-6=-13
  -13-7=-20
  
  8, 7, 5, 2, -2, -7, -13, -20, -28
  
  8th term = -20
• 10 years agoHelpfull: Yes(3) No(0)
• 8 - 1 =7
  7 - 2 = 5
  5 - 3 = 2
  2 - 4 = -2
  -2 - 5 = -7
  -7 - 6 = -13
  -13 - 7 = -20
  -20 - 8 = -28
  
  Ans : -28
• 10 years agoHelpfull: Yes(0) No(1)
• 20
  difference is in terms of 1,2,3,4,5,6,7
  
• 10 years agoHelpfull: Yes(0) No(0)
• 1st term= 8
  2nd term=8-1=7
  3rd term=7-2=5
  4th term=5-3=2
  5th term=2-4=-2
  6th term=-2-5=-7
  7th term=-7-6=-13
  8th term=-13-7=-20
• 10 years agoHelpfull: Yes(0) No(0)
• Sorry 8th term is : -20
• 10 years agoHelpfull: Yes(0) No(0)
• -20
  difference is in terms of 1,2,3,4,5,6,7
• 10 years agoHelpfull: Yes(0) No(0)
• 8-1=7
  7-2=5
  5-3=2
  2-4=-2
  -2-5=-7
  -7-6=-13
  -13-7=-20
• 10 years agoHelpfull: Yes(0) No(0)
• 8-1=7
  7-2=5
  5-3=2
  2-4=-2
  -2-5=-7
  -7-6=-13
  -13-7=-20
  
  the series is 8 7 5 2 -2 -7 -13 -20.
  and the 8th term is -20.
• 10 years agoHelpfull: Yes(0) No(0)
• subtract minus 1 from each value
  so 6 th is -2-5=-7
  7th is -7-6=-13
  8th is -13-7=-20
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• 8-7=1
  7-5=2
  5-2=3
  2-(-2)=4
  so next should be 5,then
  -2-x=5==>x=-7,
  -13
  -20
• 9 years agoHelpfull: Yes(0) No(0)