asdas

 tr=0.714190048071806
def g(x)
  0.9/(1.0+x**(4.0))
end
results=Array.new
eps= 0.00001
x0 = 0.75
x1 = x0+eps*10.0
i = 0
while ((x1-x0).abs>eps) do 
  x0=i==0 ? 0.75 : x1
  x1=g(x0)
  results[i]= x1
  i +=1
end

results.length.times{|i|
  puts "#{i}.   #{results[i]}   #{tr-results[i]}"  
}

tr= 0.714190048071806
def g(x)
  0.9/(1.0+x**(4.0))
end
results=Array.new
eps= 0.00001
x0 = 0.75
x1 = 0
x2 = 0
l2 = 0
x3 = x0+eps*10.0
i = 0
while ((x3-x0).abs>eps  ) do 
  x0=i==0 ? 0.75 : x3
  x1=g(x0)
  x2=g(x1)
  l2=(x2-x1)/(x1-x0)
  x3=x2+l2*(x2-x1)/(1-l2)
  results[i]= x1
  i +=1
end

results.length.times{|i|
  puts "#{i}.   #{results[i]}   #{tr-results[i]}"  
}