How is the nth term found?

The nth term equals the first term plus (n minus 1) times the common difference.

How is the sum computed?

The sum of n terms equals n divided by 2, times the sum of the first and the nth term.

Find the nth term and the sum of an arithmetic progression.

First term (a₁)Common difference (d)Number of terms (n)

10th term

Sum of 10 terms

155

Enter the first term, common difference and number of terms to get the nth term and the sum of the sequence.

How is the nth term found?: The nth term equals the first term plus (n minus 1) times the common difference.
How is the sum computed?: The sum of n terms equals n divided by 2, times the sum of the first and the nth term.