Finite Math and Applied Calculus (6th Edition)

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

Chapter 13 - Section 13.4 - The Definite Integral: Algebraic Viewpoint and the Fundamental Theorem of Calculus - Exercises - Page 999: 53

Answer

$\dfrac{1}{2}$

Work Step by Step

We are given that $y=xe^{x^2} $ and $x=0$ to $x=(\ln 2)^{1/2}$ Here, the area $(A)$ can be expressed as: $A=\int_0^{(\ln 2)^{1/2}} xe^{x^2} \ dx$ Let us consider that $u=x^2 \implies dx=\dfrac{du}{2x}$ Now, we have $A=\dfrac{1}{2} \int_0^{(\ln 2)^{1/2}} e^u \ du $ or, $=[\dfrac{1}{2} e^u ]_0^{(\ln 2)^{1/2}}+C$ or, $=[\dfrac{1}{2} e^{x^2}]_0^{(\ln 2)^{1/2}} +C$ or, $=\dfrac{1}{2} [e^{[(\ln 2)^{1/2}]^2}-e^0]$ Therefore, the required area is: $Area=\dfrac{1}{2}$
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