Question:
If A = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], then insert the appropriate symbol ∈ or ∉ in each of the following blanks spaces:
(i) 4 ...... A
(ii) −4 ...... A
(iii) 12 ...... A
(iv) 9 ...... A
(v) 0 ...... A
(vi) −2 ...... A
Solution:
(i) $4 \in A$
(ii) $-4 \notin A$
(iii) $12 \notin A$
(iv) $9 \in A$
(v) $0 \in A$
(vi) $-2 \notin A$
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