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86. Let 173 & A = {1,23... n} How many subsets B of A have the property that BU {1, 2² =A ?

86. Let 173 & A = {1,23... n} How many subsets B of A have the property that BU {1, 2² =A ?

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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86. Let n=3& A = {1,2,3... n} How many subsets B of "A have the property that BU {1, 2² =A ?
Transcribed Image Text:86. Let n=3& A = {1,2,3... n} How many subsets B of "A have the property that BU {1, 2² =A ?
Expert Solution
Step 1: Explanation

Here, the set B have to have all the elements of A except 1 or 2 or both. That will only satisfy the given condition.

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