. consider the following sets: U = {-5,–4,–3, – 2, –1,0,1,2,3,4,5}, A = {x: x² = 25}, %3D CTY B = {-5,0,1,2,3,4, 5} C = {x:x² – 5x + 6 = 0}. a. What is A n B? b. Which is equal to B\C? c. Which set is equal to (B\A)°? d. What is the cardinality of a countably infinite set?

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