192KiB, 780x459, 1_XNkpCHr_CXWXRY1R4gqZNg.png View SameGoogleiqdbSauceNAO Anonymous Wed 03 Feb 22:45:42 2021 No.12663717 ViewReplyOriginalReport Quoted By: How do you derive the beautiful relation of e^ (e^x - 1) = ? n=0 to inf (B(n) / n!) * x^n? Where B(n) is a bell number?
