Pre Calc 11- Week 2

In math this week I learned how to find the common difference of an arithmetic sequence when the terms do not come one after the other. Usually, it is easy to find a common difference when you have for ex. and  for that all you do is , then you have the common difference for the sequence. But when you are given  and , it’s not as easy as subtracting them. To find the difference for this sequence you need to plug  into the equation, then you add however many differences there is between and . In this case, there’s 7 differences so you need to add 7d onto . It should look like . Then you solve for d.