Step
*
of Lemma
qavg_wf
∀[a,b:ℚ]. (qavg(a;b) ∈ ℚ)
BY
{ (Unfold `qavg` 0 THEN Auto) }
Latex:
Latex:
\mforall{}[a,b:\mBbbQ{}]. (qavg(a;b) \mmember{} \mBbbQ{})
By
Latex:
(Unfold `qavg` 0 THEN Auto)
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