Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Chapter 14 - Section 14.4 - Tangent Planes and Linear Approximation - 14.4 Exercise - Page 935: 30

Answer

$ze^{-y^2-z^2}dx-2xyze^{-y^2-z^2}dy+e^{-y^2-z^2}(x-2xz^2)dz$

Work Step by Step

We are given that $L=xze^{-y^2-z^2}$ The differential form is written as: $dL=(\dfrac{\partial L}{\partial x}) dx +(\dfrac{\partial L}{\partial y}) dy+(\dfrac{\partial L}{\partial z}) dz$ The partial derivatives with respect to $x$ and $y$ and $z$ are given as: $dL=(\dfrac{\partial L}{\partial x}) dx +(\dfrac{\partial L}{\partial y}) dy+(\dfrac{\partial L}{\partial z}) dz=ze^{-y^2-z^2}dx+(-2xyze^{-y^2-z^2})dy+e^{-y^2-z^2}(x-2xz^2)dz$ or, $dL=ze^{-y^2-z^2}dx-2xyze^{-y^2-z^2}dy+e^{-y^2-z^2}(x-2xz^2)dz$
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