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Step * 2 of Lemma arctangent-rleq

.....antecedent..... 
1. x : ℝ
2. r0 ≤ x
3. ∀x:ℝ. (r0 < (r1 + x^2))
⊢ r1 - (r1/r1 + x^2) continuous for x ∈ [r0, ∞)
BY
{ (BLemma `function-is-continuous` THEN Auto) }

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Latex:

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Latex:
.....antecedent..... 
1.  x  :  \mBbbR{}
2.  r0  \mleq{}  x
3.  \mforall{}x:\mBbbR{}.  (r0  <  (r1  +  x\^{}2))
\mvdash{}  r1  -  (r1/r1  +  x\^{}2)  continuous  for  x  \mmember{}  [r0,  \minfty{})


By

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Latex:
(BLemma  `function-is-continuous`  THEN  Auto)

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