Sets in polar coordinates Sketch the following set of points. 4 ≤ r2 ≤ 9

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter84: Binary Numeration System
Section: Chapter Questions
Problem 1A
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Sets in polar coordinates Sketch the following set of points.

4 ≤ r2 ≤ 9

Expert Solution
Step 1

Given that

4r29

Step 2

Since 

r2=x2+y2

So 4x2+y29

That is x2+y24 and x2+y29

Both inequality represented by equation of circle whose radius is less then or equal to 3 and greater than or equal to 2. 

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