To find the nth term, first calculate the common difference, d . Next multiply each term number of the sequence (n = 1, 2, 3, …) by the common difference. Then add or subtract a number from the new sequence to achieve a copy of the sequence given in the question.

How do you solve series and sequence problems?

The formulae for sequence and series are:
The nth term of the arithmetic sequence or arithmetic progression (A.P) is given by an = a + (n – 1) d.The arithmetic mean [A.M] between a and b is A.M = [a + b] / 2.The nth term an of the geometric sequence or geometric progression [G.P] is an = a * rn–1