Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Chapter 9 - Review - Exercises - Page 635: 7

Answer

The solution of the given differential equation $$ 2 y e^{y^{2}} y^{\prime}=2 x+3 \sqrt{x} $$ is $$ y =\pm \sqrt {\ln \left(x^{2}+2 x^{3 / 2}+C\right)} $$ where $C$ is any nonzero constant.

Work Step by Step

$$ 2 y e^{y^{2}} y^{\prime}=2 x+3 \sqrt{x} $$ We write the equation in terms of differentials and integrate both sides: $$ 2 y e^{y^{2}} d y=(2 x+3 \sqrt{x}) d x $$ $$ \int 2 y e^{y^{2}} d y=\int(2 x+3 \sqrt{x}) d x $$ $\quad\quad\quad\quad \Rightarrow$ $$ e^{y^{2}}=x^{2}+2 x^{3 / 2}+C \Rightarrow y^{2}=\ln \left(x^{2}+2 x^{3 / 2}+C\right) $$ $\quad\quad\quad\quad \Rightarrow$ $$ y =\pm \sqrt {\ln \left(x^{2}+2 x^{3 / 2}+C\right)} $$ where $C$ is any nonzero constant. So the solution of the differential equation $$ 2 y e^{y^{2}} y^{\prime}=2 x+3 \sqrt{x} $$ is $$ y =\pm \sqrt {\ln \left(x^{2}+2 x^{3 / 2}+C\right)} $$ where $C$ is any nonzero constant.
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