Sequence and Series Formulas The nth term, an, of an Arithmetic Progression (A.P) where the first term is 'a' and the common difference is 'd' is given by the formula: an=a+ (n–1)d where, a ...

You will need to be confident with arithmetic sequences and the 𝑛th term rule to understand these other types of sequences. A geometric sequence contains numbers that are multiplied by a ...