lean_workbook_plus_80936

Proved

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

For ${\max}(2x-1; x+1)$ , it is $2x-1$ for $x \geq 2$ and $x+1$ for $x<2$ .

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_80936 (x : ℝ) : max (2*x-1) (x+1) = if x ≥ 2 then 2*x-1 else x+1   :=  by sorry

Source