Prove2Me

lean_workbook_plus_68375

Proved

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

7⋅8n=(2n+1)3−(2n)3;7 \cdot 8^n = (2^{n+1})^{3} - (2^n)^{3};

Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_68375 (n : ℕ) : 7 * 8^n = (2^(n+1))^3 - (2^n)^3   :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook

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