T/F The range of a function is always a subset of its codomain.

T/F The sum of the first n positive integers is n(n+1)/2.

T/F If g:AB, f:BC are injective functions, so is fg. T/F The sum of the squares of the first n positive integers is (n(n+1)(n+2))/3.

T/F The power set of a set always has double the cardinality of the set. T/F The power set of the empty set is empty. T/F The complement of the intersection of two sets is the intersection of their complements. T/F If g:AB, f:BC are functions and fg is a bijection, then f and g must also be bijective. T/F It is possible for a set and its complement to both be empty.