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: 16

Answer

$y=e^{\frac{-1}{x}+1}$

Work Step by Step

We are given that $x^2 \dfrac{dy}{dx}=y$ We will separate the variables to obtain: $\dfrac{\ dy}{y}=\dfrac{\ dx}{x^2}$ Integrate to obtain: $\int \dfrac{\ dy}{y}=\int \dfrac{\ dx}{x^2}$ This implies that $\ln |y|=\dfrac{-1}{x}+C$ After applying the initial conditions, $y=1$ when $x=1$, we get $C=1$ Therefore, we have: $\ln |y|=\dfrac{-1}{x}+1 \implies y=e^{\frac{-1}{x}+1}$
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