tauto
case succ.inl.«0»
n : ℕ
h : 2 ≤ 0 → ∏ x ∈ Ico 1 (succ 0), (↑x + 1) / ↑x = ↑0 + 1
hn : 2 ≤ 0 + 1
h✝ : 0 < 2
⊢ ((∏ x ∈ Ico 1 (0 + 1), (↑x + 1)) / ∏ x ∈ Ico 1 (0 + 1), ↑x) * ((↑0 + 1 + 1) / (↑0 + 1)) = ↑0 + 1 + 1
no goals