title: How to tell if a relation is in 2nf given a set of Functional Dependencies?
body: <p>I cant seem to understand this process, I have F =</p>
  
  <pre><code>{ab} -&gt; {cde}
  {d} -&gt; {abce}
  {a} -&gt; {e}
  </code></pre>
  
  <p>The keys would be: {a,b} and {d}.
  How would I prove this is in 2nf or not?</p>