lean_workbook_plus_3372

Open

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

Prove that $1+2\ln{x}\leq{x^{2}}$ $(x>0)$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_3372 (x : ℝ) (hx : 0 < x) : 1 + 2 * Real.log x ≤ x^2   :=  by sorry

Source