Arithmetic progression is a sequence, such as the positive odd integers 1, 3, 5, 7, . . . , in which each term after the first is formed by adding a constant to the preceding term.
This constant difference is called common difference.
Given this, each member of progression can be expressed as
Sum of the n members of arithmetic progression is
Below is the calculator of nth term and sum of n members of progression. To solve typical arithmetic sequences problems you can use this calculator.