0302132人目の素数さん垢版2018/04/25(水) 01:43:11.01ID:i3CGBkWM >>296 >>300 y = √{(1/2)^2 + (4/3 - 2x)^2} (←等積条件) x + 2y ≧ (8+3√15)/12 = 1.6349 x = 2/3 - 1/(4√15) = 2/3 - (tanδ)/4 = 0.60212 sinδ = 1/4,