# Arithmetic Series Online Calculator

Online calculator to calculate the sum of the first n terms and the nth term of an arithmetic sequence.

If A1, A2, ... , An, ... is an arithmetic sequence with common difference d, this calculator calculates the sum Sn given by

__How to use the calculator__

1 - Enter the first term **A1** in the sequence, the common difference **d** and **n** the number of terms in the sum then press enter. An example is shown where a_{1} and d may entered as integers, decimals or fractions and n must be a positive integer.

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