If ∞ is a cluster point of S ⊂ R if for every M ∈ R, there exists an x ∈ S such that x ≥ M. Similarly −∞ is a cluster point of S ⊂ R if for every M ∈ R, there exists an x ∈ S such that x ≤ M. Prove the limit at ∞ or −∞ is unique if it exists.

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Q: 15. Let f : R → R, let I be an open interval in R, and let ce 1. If f, is the restriction of f to 1.…

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