Consider the following families of sets indexed by the set of natural numbers. Which among these is closed? nA_n where A_n=(0,1+1/n) nB_n where B_n= [0,1+1/n) OUC_n where C_n= [(2n+1)/n, 3] None of the above

Consider the following families of sets indexed by the set of natural numbers. Which among these is closed? nA_n where A_n=(0,1+1/n) nB_n where B_n= [0,1+1/n) OUC_n where C_n= [(2n+1)/n, 3] None of the above

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter9: Sequences, Probability And Counting Theory

Section9.5: Counting Principles

Problem 38SE: Suppose a set A has 2,048 subsets. How many distinct objects are contained in A?

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Question

Consider the following families of sets indexed by the set of natural numbers. Which among
these is closed?
nA_n where A_n=(0,1+1/n)
nB_n where B_n= [0,1+1/n)
OUC_n where C_n= [(2n+1)/n, 3]
None of the above

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