Question: Let M in R and let (sn) be a sequence satisfying both of the following conditions: i. sn0, the set {n in N: |sn-M|

Let M in R and let (sn) be a sequence satisfying both of the following conditions: i. sn0, the set {n in N: |sn-M|<} is infinite. Prove that lim supsn = M

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