Please do not answer if you are not 100% sure what the question is asking.
Given A = {1,2,42,57,99,538,677}, B = {1,5,6,7,{2,3} , and C ={1,{7}, {8,9}}, answer the following questions, use the proper notation:
Write an inequality that represents the cardinality of any proper subset of A. Let's say the cardinality of the subset is C.