# Riemann Sum 3

• Sep 2nd 2009, 05:55 PM
bearej50
Riemann Sum 3
Use a Riemann sum to approximate the area under the graph of f(x) on the given interval with the selected points as specified.

0 x ≤ 8, n = 4, Midpoint Rectangle Approximation Method
• Sep 2nd 2009, 06:15 PM
skeeter
Quote:

Originally Posted by bearej50
Use a Riemann sum to approximate the area under the graph of f(x) on the given interval with the selected points as specified.

0 x ≤ 8, n = 4, Midpoint Rectangle Approximation Method

http://www.mathhelpforum.com/math-he...emann-sum.html
• Sep 2nd 2009, 06:36 PM
bearej50
I dont see where to go without the f(x)
• Sep 3rd 2009, 04:23 AM
skeeter
Quote:

Originally Posted by bearej50
I dont see where to go without the f(x)

you have to approximate the value of a definite integral with no function information at all?

... or do you have a graph of f(x)?
• Sep 3rd 2009, 04:51 AM
HallsofIvy
If you are not given a formula for f(x) then either get the values off a graph, as skeeter suggested, if you have one, or, if you have no information about f at all, just write your formula in terms of f(1), f(3), f(5), and f(7), leaving those instead of specific values.
• Sep 3rd 2009, 05:39 PM
bearej50
The answer in the back of the book is 40. I cannot see how to arrive at this answer...
• Sep 3rd 2009, 06:03 PM
skeeter
Quote:

Originally Posted by bearej50
The answer in the back of the book is 40. I cannot see how to arrive at this answer...

need to see the graph and your work.