90 likes | 244 Views
8.1 Arc Length. We can think of the length of an arc as the limit of the sum of segment lengths a s the number of segments approaches infinity:. E ach segment has length Then, by the Mean Value Theorem, there’s a number on Such that . Then.
E N D
We can think of the length of an arc as the limit of the sum of segment lengths as the number of segments approaches infinity:
Each segment has length Then, by the Mean Value Theorem, there’s a number on Such that
Then our arc length L is Of course this is:
If the curve has equation x = g(y), and g’(y) is continuous, the arc length is
Example: find the length of the curve between the points (1,1) and (4,8):
Homework p. 552 # 3, 5, 7, 9, 11