Sec 5.1: Areas and Distances
Sec 5.1: Areas and Distances
Sec 5.1: Areas and Distances The Area Problem Divide it into triangles it isn’t so easy to find the area of a region with curved sides
Sec 5.1: Areas and Distances Find the area of the region that lies under the curve from to Use two rectangles and left endpoints
Sec 5.1: Areas and Distances
Sec 5.1: Areas and Distances Two rectangles with left endpoint 4 rectangles with left endpoint Example: Use rectangles to estimate the area under the parabola from 0 to 1 4 rectangles with right endpoint 4 rectangles with midpoint
Sec 5.1: Areas and Distances 4 rectangles with right endpoint 4 rectangles with midpoint 4 rectangles with left endpoint Estimating area with 4 rectangles using left end points Estimating area with 4 rectangles using right end points Estimating area with 4 rectangles using midpoints Notations:
Sec 5.1: Areas and Distances
Sec 5.1: Areas and Distances Math-101 Final Exam Term-131 apply the idea to problem with large number of rectangles or more general problem (n rectangles)
Example: Sec 5.1: Areas and Distances Use rectangles to estimate the area under the parabola from 0 to 1 We could obtain better estimates by increasing the number of rectangles
Sec 5.1: Areas and Distances Let’s apply the idea to the more general problem We start by subdividing the interval [a,b] into n subintervals The width of the interval [a,b] is b-a the width of each subinterval is The subintervals are
1 2 3 Sec 5.1: Areas and Distances Step Step Step partition Riemann sum for ƒ on the interval [a, b].
Sec 5.1: Areas and Distances Math-101 Final Exam Term-131
Sec 5.1: Areas and Distances Term-091
Sec 5.1: Areas and Distances Term-103
Remark: Sec 5.1: Areas and Distances Actual area How to get actual area ?
Remark: Sec 5.1: Areas and Distances Actual area Actual area Big triangle _ Small triangel
Note: Area under a curve = limit of summation Sec 5.1: Areas and Distances Note: Area under a curve = limit of summation Note: Area under the curve equals 4
Note: Area under a curve = limit of summation Sec 5.1: Areas and Distances Note: Area under a curve = limit of summation Note:
Sec 5.1: Areas and Distances Example: Use rectangles to estimate the area under the parabola from 0 to 1
Sec 5.1: Areas and Distances EXAM-1 TERM-102
Sec 5.1: Areas and Distances Example: Suppose the odometer on our car is broken and we want to estimate the distance driven over a 30-second time interval. We take speedometer readings every five seconds and record them in the following table: Distance = velocity X time assume that the velocity is constant in every 5-second interval estimate for the total distance traveled: 1135 ft