Question 1139760
.
<pre>
For n = 1, 2, 3, 4 the sequence is -4, -5, -6, -7.


It is arithmetic progression with the first term -4 and the common difference of -1.


The general formula for the n-th term is 



    {{{a[n]}}} = -4 + (n-1)*(-1) = -4 - (n-1) = -4 - n + 1 = -3 - n,  n = 1, 2 , 3, 4 . . . 


<U>ANSWER</U>.  {{{a[n]}}} = -3 - n,  n = 1, 2, 3, 4, . . . 
</pre>