Adding everything!

Howdy again, folks.  Before you get any further, here’s a little game.  Take a number, any number.  Add the digits.  If you get a two-digit or more number, add the digits again.  Keep doing that until you get a single-digit number.  We call this the terminating sum of a number, denoted .  For example, let’s calculate … More Adding everything!

Let’s Do It Again!

Welcome back once again.  Today, I’m going to talk to you about recurrence relations.  What are those, I hear you cry?  It’s very simple.  A recurrence relation defines the th term of a sequence in terms of the previous ones.  For example, if is the th term of the Fibbonaci sequence, then we have the recurrence … More Let’s Do It Again!