Thomas' Calculus 13th Edition

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

Chapter 9: First-Order Differential Equations - Section 9.1 - Solutions, Slope Fields, and Euler's Method - Exercises 9.1 - Page 532: 37

Answer

$1.5275$

Work Step by Step

Here, $\int y dy=\int \sqrt x dx$ ...(1) and $(\dfrac{y^2}{2})=\dfrac{2}{3}x^{(3/2)}+c$ ...(2) Further, apply the initial conditions. $\dfrac{1}{2}=\dfrac{2}{3}(0)^{3/2}+c$ or, $c=\dfrac{1}{2}$ Now, the particular solution as follows: $(\dfrac{y^2}{2})=\dfrac{2}{3}x^{(3/2)}+c \implies \dfrac{y^2}{2}=(\dfrac{2}{3})x^{(3/2)}+(\dfrac{1}{2})$ Thus, $y=\sqrt {\dfrac{4}{3}x^{(3/2)}+1}$ and $y(1)=\sqrt {\dfrac{4}{3}+1} \approx 1.5275$
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