Question

Write an expression to describe the sequence below, and then find the 9th term. Use n to represent the position of a term in the sequence, where n = 1 for the first term.

–3, –6, –9, –12, ...

Answer 1

The expression to describe the sequence is n(-3). To find the 9th term, we substitute n = 9 into the expression:

9(-3) = -27

Therefore, the 9th term of the sequence is -27.