0080132人目の素数さん垢版 | 大砲2017/12/13(水) 00:14:18.04ID:IInGjIF+ R = 1/(1+1/(1+2/(1+3/(1+4/(…)))))=(√e)∫[1,∞]e^(-xx/2)dx = √(eπ/2)erfc(1/√2)= 0.6556795424188 S = Σ[k=1,∞]1/(2k-1)!! =(√e)∫[0,1]e^(-xx/2)dx = √(eπ/2)・erf(1/√2)= 1.4106861346424 辺々たすと R + S = √(eπ/2)= 2.0663656770612