Download presentation

1
**Mrs. Cartledge Arc length**

Calculus Phantom’s Revenge Kennywood Park Mrs. Cartledge Arc length Sec 7.4

2
Objectives Determine the length of a curve.

3
**Area Under a Curve (revisited)**

We use the definite integral to find the area under a curve. The limits of integration are a and b. The height of the rectangle is represented by f(x), the width by dx and the sum by the definite integral.

4
**Sum of Disks as the Volume (revisited)**

5
Finding Arc Length We want to determine the length of the continuous function f(x) on the interval [a,b] . Initially we’ll need to estimate the length of the curve. We’ll do this by dividing the interval up into n equal subintervals each of width x and we’ll denote the point on the curve at each point by Pi. We can approximate the curve by a series of straight lines connecting the points.

6
**The length of one segment**

P5 P4

7
**The length of all segments**

8
**Definition of Arc Length**

9
**Example Applying the Definition**

10
Example Find the length of the specified curve. =

11
**Algorithm to Find Arc Length**

Determine whether the length is with respect to x or y, and then find the endpoints for the interval. Find y’(x) or x’(y). Plug the derivative into the formula: Evaluate.

12
Sample Find the length of the specified curve. [1,2]

13
Sample Find the length of the specified curve. You are given the x values but you need c and d!!

14
Sample Find the length of the specified curve. y = sin(x) [0, ¶ ]

15
Sample Find the length of the specified curve. y = (x2 – 4)2 [0, 4 ]

16
**Example A Vertical Tangent**

17
Sample y = x1/5 [-1,4]

18
Closure Explain the difference in these two formulas.

19
**Independent Assignment**

Notebook: p 485 # 3 - #11 odd. Check your answers in the back of the book. Graded Assignment: HW Sec 7.4 in Schoology. Enter the first ½ of the answers in Schoology. Due Tuesday, May 15, before class.

Similar presentations

OK

Definite Integral df. f continuous function on [a,b]. Divide [a,b] into n equal subintervals of width Let be a sample point. Then the definite integral.

Definite Integral df. f continuous function on [a,b]. Divide [a,b] into n equal subintervals of width Let be a sample point. Then the definite integral.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on different types of dance forms list Ppt on word association test pdf Ppt on csr and sustainable development Make ppt online Ppt on brushless servo motor Ppt on views in dbms Ppt on classical dances of india Ppt on business development planning Ppt on equality in indian democracy Ppt on natural numbers math