University Calculus: Early Transcendentals (3rd Edition)

Published by Pearson
ISBN 10: 0321999584
ISBN 13: 978-0-32199-958-0

Chapter 13 - Section 13.2 - Limits and Continuity in Higher Dimensions - Exercises - Page 691: 31


a) for all (x,y) b) for all (x,y) except (0,0)

Work Step by Step

a) We know that $\sin t$ is defined for all real numbers. Thus, for all $(x,y)$ b) $\ln t$ is defined for positive real numbers except for $(0,0)$.
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