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Step * of Lemma addrcos_wf2

∀[x:ℝ]. (addrcos(x) ∈ {f:ℕ+ ⟶ ℤ| f = (x + rcos(x))} )
BY
{ (D 0 THENA Auto) }

1
1. x : ℝ
⊢ addrcos(x) ∈ {f:ℕ+ ⟶ ℤ| f = (x + rcos(x))} 

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Latex:

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Latex:
\mforall{}[x:\mBbbR{}].  (addrcos(x)  \mmember{}  \{f:\mBbbN{}\msupplus{}  {}\mrightarrow{}  \mBbbZ{}|  f  =  (x  +  rcos(x))\}  )


By

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Latex:
(D  0  THENA  Auto)

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