Answered

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2. f: x -> y. Prove that:

a) is x a cluster point of A?

b) Is f(x) a cluster point of f(A)?

c) Is f continuous?

3. Prove that:

a) A bar union B bar = Bar (AUB)

b) A bar ∩ B bar = Bar (A ∩ B)

Sagot :

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