 reserve n,s for Nat;

theorem Th85:
  for a, b being Real holds
    geo-seq (a,b) is convergent & lim geo-seq (a,b) = 0
  proof
    let a, b be Real;
    for k being Nat holds geo-seq (a,b).k = a / (k + b) by Def15;
    hence thesis by SEQ_4:31;
  end;
