Multivariable Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 0-53849-787-4
ISBN 13: 978-0-53849-787-9

Chapter 11 - Infinite Sequences and Series - Exercises 11.7.1 - 11.7.9 - Page 764: 15

Answer

Convergent

Work Step by Step

$\sum_{k =1}^{\infty}\frac{2^{k-1}3^{k+1}}{k^k}=\frac{3}{2}\sum_{k =1}^{\infty}(\frac{6}{k})^{k}$ $\lim\limits_{k \to \infty}\frac{3}{2}\sqrt[k] {(\frac{6}{k})^{k}}=\frac{3}{2}\lim\limits_{k \to \infty}\frac{6}{k}$ $=0\lt 1$ Convergent.
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