Sum
Find the cardinal number of the following set.
R = {x : x is an integer, x ∈ Z and – 5 ≤ x < 5}
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Solution
x ∈ z
R = {– 5, – 4, – 3, – 2, – 1, 0, 1, 2, 3, 4}
∴ n(R) = 10
Concept: Types of Sets
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