# Week 10 PreCalc 11

Semingly I didn’t learn anything new this week, I did forget most about how to do sequences and series. But after studying I remembered how to find $t_n$ or how to find $S_n.$

Example:

But the one thing I had troubles with was finding $t_1$ when i am givin $t_4 and t_10$ but after figuring it out I found it pretty easy because all you have to do is find out how many numbers are in between 4 and 10 and then the rest is easy.

Ex: