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Determine the cardinal number for the given set. {1,2,3,4,5,4,3,2,1}

User Buddie
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Final answer:

The cardinal number for the set {1,2,3,4,5,4,3,2,1} is 5, as there are 5 distinct elements after ignoring duplicates.

Step-by-step explanation:

To determine the cardinal number of the given set, {1,2,3,4,5,4,3,2,1}, we count the number of distinct elements in the set. A set does not include duplicates, so each element is only counted once, regardless of how many times it is listed.

The set contains the following distinct numbers: 1, 2, 3, 4, 5. We can see that there are no more unique elements in the set, so the cardinal number, which represents the number of elements in a set, is 5.

So, the cardinal number for the set {1,2,3,4,5,4,3,2,1} is 5.

User Ldiqual
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