What is an arithmetic sequence? Write a formula for the nth term of an arithmetic sequence.

Step 1:

The definition of arithmetic sequence is,
The arithmetic sequence is sequence where the difference between the two successive term is constant
Step 2:

The formula of the nth term of the sequence is,
$a_n=a_1+(n-1)d$
Where, $a_n$ repreesnts nth term.
$a_1$ repreesnts 1th term d repreesnts the common difference