Calculus, 10th Edition (Anton)

Published by Wiley
ISBN 10: 0-47064-772-8
ISBN 13: 978-0-47064-772-1

Chapter 12 - Vector-Valued Functions - 12.5 Curvature - Exercises Set 12.5 - Page 879: 27

Answer

Radius of curvature R=$\frac{(1+e^2)^\frac{3}{2}}{e^2}$

Work Step by Step

Given:- $\\y=e^{-x}$ $\\y'=-e^{-x}$ $\\y''=e^{-x}$ R=$\frac{(1+(-e^{-x})^2)^\frac{3}{2}}{e^-x}$ R=$\frac{(1+(-e^{-1})^2)^\frac{3}{2}}{e^{-1}}$ at x=1 After solving above equation we get R=$\frac{(1+e^2)^\frac{3}{2}}{e^2}$ Ans.
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