Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 12 - Section 12.2 - Arithmetic Sequences - 12.2 Exercises: 11

Answer

$a_{n}$ = 9 + 4(n-1) 10th term: 45

Work Step by Step

Use the formula $a_{n}$ = a + d(n-1) and plug in the given values to find a formula for the nth term. For the 10th term, plug in 10 for n and solve: $a_{10}$ = 9+4(10-1) = 9+(4$\times$9) = 36 + 9 = 45.
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