Complete each of the following. (a) Compute the arc length of the portion of the curve r(t) = (2t, t², In t) between the points (2, 1, 0) and (4, 4, In 2).

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Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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**Problem Statement:**

Complete each of the following.

(a) Compute the arc length of the portion of the curve \( r(t) = \langle 2t, t^2, \ln t \rangle \) between the points \( (2, 1, 0) \) and \( (4, 4, \ln 2) \).

(b) If \( r(t) \) represents a smooth curve in \( \mathbb{R}^n \), then the *arc length parametrization* \( \rho \) of \( C \) is a parametrization of the form \( \rho(s) = r(t(s)) \) (in other words, solve the arc length function \( s = s(t) \) for \( t \) as a function of \( s \), then plug this into \( r \)). Find the arc length parametrization of the circle \( C \) of radius \( R > 0 \) in the plane \( \mathbb{R}^2 \).
Transcribed Image Text:**Problem Statement:** Complete each of the following. (a) Compute the arc length of the portion of the curve \( r(t) = \langle 2t, t^2, \ln t \rangle \) between the points \( (2, 1, 0) \) and \( (4, 4, \ln 2) \). (b) If \( r(t) \) represents a smooth curve in \( \mathbb{R}^n \), then the *arc length parametrization* \( \rho \) of \( C \) is a parametrization of the form \( \rho(s) = r(t(s)) \) (in other words, solve the arc length function \( s = s(t) \) for \( t \) as a function of \( s \), then plug this into \( r \)). Find the arc length parametrization of the circle \( C \) of radius \( R > 0 \) in the plane \( \mathbb{R}^2 \).
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