Calculus: Early Transcendentals 9th Edition

Published by Cengage Learning
ISBN 10: 1337613924
ISBN 13: 978-1-33761-392-7

Chapter 4 - Section 4.9 - Antiderivatives - 4.9 Exercises - Page 362: 27

Answer

$F(x)=2e^x-3x^2-1$

Work Step by Step

Given $f(x)=2e^x-6x$ and $F(0)=1$ The antiderivative of $2e^x$ is $2e^x$ and the antiderivative of $6x$ is $\frac{6}{1+1}x^{1+1}=\frac{6}{2}x^2=3x^2$. Then, $f(x)$ has the antiderivative $F(x)=2e^x-3x^2+C$. Substituting $F(0)=1$, $2e^0-3\cdot 0^2+C=1$ $2\cdot 1-3\cdot 0+C=1$ $2-0+C=1$ $C=-1$ Thus, $F(x)=2e^x-3x^2-1$. Graph $f$ and $F$:
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