Calculus: Early Transcendentals 8th Edition

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

Chapter 4 - Section 4.9 - Antiderivatives - 4.9 Exercises - Page 356: 46

Answer

$f(x)=\displaystyle \frac{9}{28}t^{7/3}+\cos t+(\frac{19}{28}-\cos 1)t+1$

Work Step by Step

$f''(t)=t^{1/3}-\cos t$ Using the antiderivatives table, $f'(x)=\displaystyle \frac{t^{4/3}}{4/3}-\sin t+C=\frac{3}{4}t^{4/3}-\sin t+C$ Using the antiderivatives table, $f(x)=\displaystyle \frac{3}{4}(\frac{t^{7/3}}{7/3})+\cos t+Ct+D$ $f(x)=\displaystyle \frac{9}{28}t^{7/3}+\cos t+Ct+D$ $\left\{\begin{array}{llll} f(0)=2 & \Rightarrow & 0+1+0+D=2 & \\ & & D=1 & \\ & & & \\ f(1)=2 & \Rightarrow & & \frac{9}{28}+\cos 1+C+1=2\\ & & & C=\frac{19}{28}-\cos 1\\ & & & \end{array}\right.$ $f(x)=\displaystyle \frac{9}{28}t^{7/3}+\cos t+(\frac{19}{28}-\cos 1)t+1$
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