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Step * of Lemma i-member-approx

∀I:Interval. ∀x:ℝ. ∀n:ℕ+.  ((x ∈ i-approx(I;n)) ⇒ (x ∈ I))
BY
{ (Auto THEN BLemma `i-member-iff` THEN Auto) }

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Latex:

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Latex:
\mforall{}I:Interval.  \mforall{}x:\mBbbR{}.  \mforall{}n:\mBbbN{}\msupplus{}.    ((x  \mmember{}  i-approx(I;n))  {}\mRightarrow{}  (x  \mmember{}  I))


By

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Latex:
(Auto  THEN  BLemma  `i-member-iff`  THEN  Auto)

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