Let A = (x = R: 7 ≤x < 20} and B = {7, 18, 19, 20, 21). What is A - B? A. {x ER: (7

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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]
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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