Answer: The nth term of this sequence is a n= 11n-2
Step-by-step explanation:
Sequence : 9, 20, 31, 42
Difference : +11, +11, +11
The formula for nth term of an arithmetic progression is a n= d.n+a1-d
The formula for nth term of an arithmetic progression is d= 11 and a1=9
so.
a n=d.n+a 1-d
a n=11.n+9-11
a n=11n-2
Hope it helps :)