lean_workbook_plus_61096

Proved

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

$a=-1$ and $b=-2$ and the solution $\boxed{f(x)=-x-2}$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_61096 (a b : ℝ) (f : ℝ → ℝ) (hf: f = fun x => a * x + b) : a = -1 ∧ b = -2 → f = fun x => -x - 2   :=  by sorry

Source