lean_workbook_plus_23231

Proved

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

Let $a,b>0$ . Prove that $\frac{a^2}{b^2}+\frac{b}{a+b}>\frac{4}{5}$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_23231 (a b : ℝ) (ha : 0 < a) (hb : 0 < b) : a^2 / b^2 + b / (a + b) > 4 / 5   :=  by sorry

Source