lean_workbook_plus_13077
ProvedProve the equality for .
Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_13077 (x : ℝ) (hx : abs x < 1) : ∑' n : ℕ, x ^ n = 1 / (1 - x) := by sorry
Source
Prove the equality for .
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_13077 (x : ℝ) (hx : abs x < 1) : ∑' n : ℕ, x ^ n = 1 / (1 - x) := by sorry