Finite Math and Applied Calculus (6th Edition)

Published by Brooks Cole
ISBN 10: 1133607705
ISBN 13: 978-1-13360-770-0

Chapter 14 - Section 14.6 - Differential Equations and Applications - Exercises - Page 1068: 13

Answer

$y=\sqrt[3] {x^3+8}$

Work Step by Step

We are given that $\dfrac{dy}{dx}=\dfrac{x^2}{y^2}$ We will separate the variables to obtain: $y^2 \ dy=x^2 \ dx$ Integrate to obtain: $\int y^2 \ dy=\int x^2 \ dx$ This implies that $\dfrac{y^3}{3}=\dfrac{x^3}{3}+C$ After applying the initial conditions, $y=2$ when $x=0$, we get $C=\dfrac{8}{3}$ Therefore, we have: $ \dfrac{y^3}{3}=\dfrac{x^3}{3}+\dfrac{8}{3} \implies y=\sqrt[3] {x^3+8}$
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