
Precalculus or Calculus In Exercises 1 and 2, decide whether the problem can be solved using precalculus or whether calculus is required. If the problem can be solved using precalculus, solve it. If the problem seems to require calculus, explain your reasoning and use a graphical or numerical approach to estimate the solution.
Find the distance between the points (1, 1) and (3, 9) along the curve y=x2.

To calculate: The distance between the points (1,1) and (3,9) along the curve y=x2.
Answer to Problem 1RE
Solution: The distance between the points (1,1) and (3,9) along the curve y=x2 is ≈8.26815.
Explanation of Solution
Given:
The curve y=x2 and the points (1,1) and (3,9)
Formula used:
L(x1,x2)=x2∫x1√1+[f′(x)]2dx where L(x1,x2) is the path between the points.
Calculation:
To solve this problem we need to use calculus as the path between the points, (1,1) and (3,9) is nonlinear.
Using the formula, L(x1,x2)=x2∫x1√1+[f′(x)]2dx, where L(x1,x2) is the pathbetween the points (1,1) and (3,9) along the curve y=x2.
Here, f(x)=x2 and f′(x)=2x.
Thus, L(x1,x2)=3∫1√1+4x2dx≈8.26815
The distance between the points (1,1) and (3,9) along the curve y=x2 is ≈8.26815.
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Chapter 2 Solutions
Bundle: Calculus: Early Transcendental Functions, 6th + WebAssign Printed Access Card for Larson/Edwards' Calculus, Multi-Term
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