Let A = (x = R: 7 ≤x < 20} and B = {7, 18, 19, 20, 21). What is A - B? A. {x ER: (7
Let A = (x = R: 7 ≤x < 20} and B = {7, 18, 19, 20, 21). What is A - B? A. {x ER: (7
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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![Let A = {x € R: 7 < x < 20} and B = {7, 18, 19, 20, 21}. What is A-B?
A. {x € R: (7<x<18) (18 < x <19) )v(19 <x<20)}
B. {x € R: (7 ≤x≤18)^(18 < x <19))^(19<x<20)}
C. [7, 18][18, 19][19, 20]
D. [7, 18] [18, 19] [19, 20]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2b325620-1c76-49a2-949a-3bc21585d9e1%2F8682de00-ab19-4984-9191-7324257f2958%2F0on6x6r_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Let A = {x € R: 7 < x < 20} and B = {7, 18, 19, 20, 21}. What is A-B?
A. {x € R: (7<x<18) (18 < x <19) )v(19 <x<20)}
B. {x € R: (7 ≤x≤18)^(18 < x <19))^(19<x<20)}
C. [7, 18][18, 19][19, 20]
D. [7, 18] [18, 19] [19, 20]
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