Calculus, 10th Edition (Anton)

Published by Wiley
ISBN 10: 0-47064-772-8
ISBN 13: 978-0-47064-772-1

Chapter 13 - Partial Derivatives - 13.2 Limits And Continuity - Exercises Set 13.2 - Page 925: 4

Answer

$${e^{ - 7}}$$

Work Step by Step

$$\eqalign{ & \mathop {\lim }\limits_{\left( {x,y} \right) \to \left( {1, - 3} \right)} {e^{2x - {y^2}}} \cr & {\text{Using the limit laws }} \cr & = {e^{\mathop {\lim }\limits_{\left( {x,y} \right) \to \left( {1, - 3} \right)} \left[ {2x - {y^2}} \right]}} \cr & {\text{then}}{\text{, substituting }}1{\text{ for }}x{\text{ and }} - 3{\text{ for }}y \cr & = {e^{2\left( 1 \right) - {{\left( 3 \right)}^2}}} \cr & {\text{simplifying}} \cr & = {e^{2 - 9}} \cr & = {e^{ - 7}} \cr} $$
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