University Calculus: Early Transcendentals (3rd Edition)

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

Chapter 14 - Section 14.3 - Area by Double Integration - Exercises - Page 772: 25

Answer

$\approx 43328$

Work Step by Step

Our aim is to integrate the integral as follows: $\int ^5_{-5} \int ^0_{-2} \dfrac{10,000e^y}{1+\dfrac{|x|}{2}} \space dy \space dx $ or, $=10,000 \times \int ^5_{-5}\dfrac{1-e^{-2} dx}{1+\dfrac{|x|}{2}})$ or, =$10000 \times (1-e^{-2})[\int^0_{-5}\dfrac{dx}{1-\dfrac{x}{2}}+\int ^5_0 \dfrac{1}{1+\dfrac{x}{2}} dx $ or, $=10000 \times (1-e^{-2})[- 2 \ln(1-\dfrac{x}{2})]^0_{-5}+10000 \times (1-e^{-2})[2 \ln(1+\dfrac{x}{2})]^5_0$ or, $=10,000(1-e^{-2})[2 \ln(1+\dfrac{5}{2})]+10,000(1-e^{-2})[2ln(1+\dfrac{5}{2})]$ or, $=40,000(1-e^{-2}) \ln(\dfrac{7}{2}) \approx 43328$
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