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GB-21-02-001 · Linear nth term

Find an expression for the nth term of this arithmetic sequence.
8,26,44,62,808,\quad 26,\quad 44,\quad 62,\quad 80

Sequences: Linear nth Term Booklet p. 25
Method
Linear sequences have form [1st difference] n + [term before 1st term (0th term)]
Worked Example (GB-21-02-001)
-10 0th term 8 26 44 62 +18 +18 +18
Booklet p. 25: [1st diff]n+[term before 1st term]=18n−10[\text{1st diff}]n + [\text{term before 1st term}] = \mathbf{18n - 10}
18n−1018n - 10