title: How to find nth digit of an irrational number of the form $\sqrt(x)$
body: <p>I'm writing a matlab code which uses digits of an irrational number. I tried finding it using a taylor expansion of  $\sqrt(1+x)$. Since division to large numbers could be a bad idea for Matlab, this method seems to me not a good one.  </p>
  
  <p>I wonder if there is any simpler and efficient method to do this?</p>