Calculate the sum of the first n terms of an arithmetic sequence using S_n = n/2 × (2a₁ + (n-1)d). Find totals quickly and accurately.
Calculate the sum of the first n terms of an arithmetic sequence using S_n = n/2 × (2a₁ + (n-1)d). Find totals quickly and accurately.
The first term of the arithmetic sequence.
The constant difference between consecutive terms.
How many terms to sum.
The sum of the first n terms equals n divided by 2 times the quantity 2 times the first term plus (n minus 1) times the common difference.
How this calculator works
The sum of the first n terms equals n divided by 2 times the quantity 2 times the first term plus (n minus 1) times the common difference.
Common questions about this calculator
