Step
*
2
of Lemma
sum_of_geometric_prog_q
1. ∀[a:ℚ]. ∀[n:ℕ]. (((1 + -(a)) * Σ0 ≤ i < n. q-rng-nexp(a;i)) = (1 + -(q-rng-nexp(a;n))) ∈ ℚ)
⊢ ∀[a:ℚ]. ∀[n:ℕ]. (((1 + -(a)) * Σ0 ≤ i < n. a ↑ i) = (1 + -(a ↑ n)) ∈ ℚ)
BY
{ (RepeatFor 2 (ParallelLast')⋅ THEN RWO "qexp-eq-q-rng-nexp" 0 THEN Auto) }
Latex:
Latex:
1. \mforall{}[a:\mBbbQ{}]. \mforall{}[n:\mBbbN{}]. (((1 + -(a)) * \mSigma{}0 \mleq{} i < n. q-rng-nexp(a;i)) = (1 + -(q-rng-nexp(a;n))))
\mvdash{} \mforall{}[a:\mBbbQ{}]. \mforall{}[n:\mBbbN{}]. (((1 + -(a)) * \mSigma{}0 \mleq{} i < n. a \muparrow{} i) = (1 + -(a \muparrow{} n)))
By
Latex:
(RepeatFor 2 (ParallelLast')\mcdot{} THEN RWO "qexp-eq-q-rng-nexp" 0 THEN Auto)
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