• 313 Sandwich rule (Sequence)
Let ｢aₙ｣, ｢bₙ｣ and ｢cₙ｣ be sequences satisfying aₙ≤bₙ≤cₙ for all n∈ℕ. If ｢aₙ｣ and ｢cₙ｣ both converges to the same limit L then ｢bₙ｣ also converges to L. ...
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