Question

What is the 25th term of this arithmetic sequence? 3, 9, 15, 21, 27, ...

Answer 1

The pattern is increasing by 6 every term but, initially decreases by 3 (6-3=3)

Let n=term#
Therefore, the pattern rule would be 6n-3, opposed to simply 6n.
To find the 25th term
6(25)-3=
150-3=
147
The 25 term would be 147.

Hope this helped!