Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 5 - The Integral - 5.1 Approximating and Computing Area - Preliminary Questions - Page 234: 5


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Work Step by Step

One can see that $ f'(x)=-2x^{-3}$ and so the $ f'$ is negative on the interval $[3,7]$. Hence, the function $ f $ is decreasing on the interval $[3,7]$, and consequently, $$ L_{100}\geq R_{100}.$$
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