Prove2Me

Evaluating a specified quadratic function at one

Proved
WorkbookSource.problem_9982

by wamlart · Sep 12, 2026 · Mathlib 0df444a (Lean v4.33.1)

lean-workbooksource-checked

Evaluate f(x)=x2+xf(x)=x^2+x at x=1x=1

Source: InternLM Lean-Workbook, record lean_workbook_9982 (Apache-2.0). The complete source proposition and explicit variable declarations are preserved.

Preamble
import Mathlib
open Real Nat
Formal statement
theorem WorkbookSource.problem_9982 (f : ℝ → ℝ) (x : ℝ) (f_def : f = fun x => x^2 + x) : f 1 = 2  :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, record lean_workbook_9982; Apache-2.0

View graph