Question

Find the 9th term of the sequence described below, where n represents the position of a term in the sequence.

an = –9n + 8

Answer 1

To find the 9th term of the sequence given by the formula \( a_n = -9n + 8 \), we substitute \( n = 9 \) into the formula:

\[
a_9 = -9(9) + 8
\]

Calculating this step-by-step:

1. Multiply \( -9 \) by \( 9 \):
\[
-9 \times 9 = -81
\]

2. Then add \( 8 \):
\[
-81 + 8 = -73
\]

Thus, the 9th term of the sequence is:

\[
\boxed{-73}
\]