0009風吹けば名無し垢版 | 大砲2023/01/26(木) 21:42:10.13ID:Xlh4azH50 >>7 log[a]x = logx/loga やから ∫ log[a]x dx = 1/loga ∫logxdx = 1/loga (xlogx - x) + C や