lean_workbook_plus_55348
ProvedProve that using combinatorial methods.
Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_55348 (n : ℕ) : (n + 1).choose 2 + n.choose 2 = n^2 := by sorry
Source
Prove that using combinatorial methods.
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_55348 (n : ℕ) : (n + 1).choose 2 + n.choose 2 = n^2 := by sorry