1024,512 , a1,a2,a3.....,a8 is the series what is the a8 in the series if the second term is the arithmatic mean (avg )of the previous term ?
what is a8?

• question was somewhat different, in condition it was given ..consecutive terms arithmetic mean beyond the second term is second term. find a8?? exactly i am also not able to recall.
  (1024+512)/2=768=a1.
  (768+512)/2=640=a2.
  similarly will get a8.
  its answer is 682.
• 9 years agoHelpfull: Yes(7) No(0)
• 628 or something that starts with 6 as far as i remember
• 9 years agoHelpfull: Yes(2) No(2)
• as 2^10=1024,2^9=512.................2^1=2
  2^1=2 will a8th term
  so a8=2
• 9 years agoHelpfull: Yes(2) No(1)
• there are 10 terms in G.P. 10th term is 2^10 so a8 is 2
• 8 years agoHelpfull: Yes(1) No(0)
• yes the answer is 682 as pointed by adarsh rajput.
• 9 years agoHelpfull: Yes(0) No(0)
• here we have to take the mean average of 2nd term. so how could we take ( (1024+512)/2=768=a1))
• 9 years agoHelpfull: Yes(0) No(1)
• 512/128=4 128=2^8 as a series upto 8
• 8 years agoHelpfull: Yes(0) No(0)