title: Leibniz Formula in Scheme
body: <p>I've spent some time looking at the questions about this on here and throughout the internet but I can't really find anything that makes sense to me.
  Basically I need help on realizing a function in scheme that evaluates Leibniz's formula when you give it a value k. The value you input lets the function know how many values in the series it should compute. This is what I have so far, I'm not sure what way I need to write this program to make it work. Thanks!</p>
  
  <pre><code>(define (fin-alt-series k)
    (cond ((= k 1)4)
          ((&gt; k 1)(+ (/ (expt -1 k) (+(* 2.0 k) 1.0)) (fin-alt-series (- k 1.0))))))
  </code></pre>