Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - 11.1 - Sequences and Series - 11.1 Exercises - Page 777: 19


$a_1=0$ $a_2=0$ $a_3=6$ $a_4=24$ $a_5=60$

Work Step by Step

$a_n=n(n-1)(n-2)$ $a_1=1(1-1)(1-2)=1(0)(-1)=0$ $a_2=2(2-1)(2-2)=2(1)(0)=0$ $a_3=3(3-1)(3-2)=3(2)(1)=6$ $a_4=4(4-1)(4-2)=4(3)(2)=24$ $a_5=5(5-1)(5-2)=5(4)(3)=60$
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