Answer:
+ 7
Explanation:
To find the nth term rule simply we just have to find the difference between the numbers
Difference between numbers
- 13 - 6 = 7
- 20 - 13 = 7
- 27 - 20 = 7
- 34 - 27 = 7
The difference between all our numbers is 7!
Hope this helps, have a lovely day! :)