Calculus 8th Edition

Published by Cengage
ISBN 10: 1285740629
ISBN 13: 978-1-28574-062-1

Chapter 4 - Integrals - 4.3 The Fundamental Theorem of Calculus - 4.3 Exercises: 11

Answer

$F'(x) = -\sqrt {1 + sec(x)}$

Work Step by Step

We are told to find the derivative using Part 1 of the Fundamental Theorem of Calculus given the expression: $F(x) = \int ^{0}_{x}\sqrt {1+sec(t)}dt$ Swap upper and lower bounds: (this makes the expression negative) $F(x) = -\int ^{x}_{0}\sqrt {1+sec(t)}dt $ Since $F(x) = \int^{b}_{a}f(t)dt$ $F'(x) = f(x)$ Thus, $F'(x) = -\sqrt {1 + sec(x)}$
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