A set contains nine elements. (a) How many subsets does it have? (b) How many proper subsets

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A set contains nine elements. 

(a) How many subsets does it have?

(b) How many proper subsets does it have?

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A Survey of Mathematics with Applications

ISBN: 978-0134112107

10th edition

Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde

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