Hi im having a few problems on this question, may anyone help me?
1. For each series, calculate t10
2+10+18+26+..........
thank you
An arithmetic sequence has the formula:
$\displaystyle U_n = a + (n-1)d$
where
- $\displaystyle U_n$ is the nth term
- $\displaystyle a = U_1$ is the first term
- $\displaystyle n$ number of terms
- $\displaystyle d$ is the common difference
In your case the common difference is 18-10 = 8
The first term is 2
the number of terms is 10
Sub those in and solve