True or false: - For every set A,AA. - For every set A,AA. - {1,2,3}={2,3,1} - A for all A. For the set A={{1,2,3},{1,2},,{1}}, - Is 1A ? - Is {1,2}A ? - Is {1,2}A ? - Is {}A ? - What is the powerset of A ? - What is the cardinality of the set {xN:x20} ? - If the cardinality of a set A is five, what is the cardinality of its power set? - What is AB for the sets A={xZ:3 divides x} and B={xZ:4 divides x}