Prove2Me

lean_workbook_plus_71012

Disproved

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

Prove that xx2+4+3x+4≤45\frac{x}{x^2+4} +\frac{3}{x+4}\leq \frac{4}{5}

Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_71012 : ∀ x : ℝ, (x / (x ^ 2 + 4) + 3 / (x + 4) ≤ 4 / 5)   :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook

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