Question

how to formulate the rule in arithmetic sequence?

Answer 1

An arithmetic sequence is a sequence where the difference between each successive pair of terms is the same. The explicit rule to write the formulafor any arithmetic sequence is this:

an = a1 + d ( n - 1 )

$hope \: it \: helps \: you.....$

Answer 2

Answer:

Given an arithmetic sequence with the first term a1 and the common difference d , the nth (or general) term is given by an=a1+(n−1)d .