Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 15: Multiple Integrals - Practice Exercises - Page 932: 5



Work Step by Step

$\int^0_{-2} \int^{4-x^2}_{2x+4}$ dy dx =$\int^0_{-2}(-x^2-2x)dx $ =$[-\frac{x^3}{3}-x^2]^0_{-2}=-(\frac{8}{3}-4)=\frac{4}{3}$ =$\int^4_0 \int^{(y-4)/2}_{-\sqrt{4-y}}dx $ dy =$\int^4_0 (\frac{y-4}{2}+\sqrt{4-y})dy $ =$[\frac{y^2}{2}-2y-\frac{2}{3}(4-y)^{3/2}]^{4}_0$ =$4-8+\frac{2}{3} \cdot 4^{3/2}=-4+\frac{16}{3}=\frac{4}{3}$
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