lean_workbook_plus_25053

Disproved

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

$\left( 1+x \right) \left( x+3 \right) \left( x+9 \right) \left( x+11 \right) \left( x+14 \right) \geq 14400\,x$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_25053 : ∀ x : ℝ, (1 + x) * (x + 3) * (x + 9) * (x + 11) * (x + 14) ≥ 14400 * x   :=  by sorry

Source