Let R be the region with 20
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Let R be the region with 20 <a < 30 and 10 < y < 14. The values of a function f (x, y)
are shown in the table below. You may assume that f decreases whenever r increases or y
increases.
yt \ x →
20 25
30
10
9.8
7.1
6.3
12
8.3 5.8
4.9
14
7.2
4.2
3.1
Using Riemann sums, what are the best possible upper and lower estimates for the integral
I = | f(x,y) dx dy, according to the information given?
R
O 124 < I< 518
O 124 < I< 392
O 180 < I< 310
O 241 < I< 255
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