lean_workbook_plus_67381
ProvedFind such that .
Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_67381 (n : ℕ) : n * (n + 1) / 2 = 55 ↔ n = 10 := by sorry
Source
Find such that .
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_67381 (n : ℕ) : n * (n + 1) / 2 = 55 ↔ n = 10 := by sorry