Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 11 - Section 11.2 - Arithmetic and Geometric Sequences - Exercise Set - Page 647: 68

Answer

Answers may vary. $a_n = 6*(1/2)^{n-1}$

Work Step by Step

One example of a geometric sequence in our lives is that of bouncing a ball. On the ball’s first bounce, it goes 6 feet. On the second bounce, the ball goes 3 feet. On the third bounce, it goes 1.5 feet. $3/6 =1/2$ $1.5/3 = 1/2$ The common ratio is 1/2. Our first term was 6. This can be modeled in the equation $a_n = a_1*r^{n-1}$ $a_n = 6*(1/2)^{n-1}$
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