KA10106005    排組   

2013/05/11 16:56

.設A = {a + b*2^1/2| a﹐b為有理數}﹐B = {x + y*3^1/2| x﹐yÎA}﹐
K = {a + b*2^1/2c*3^1/2d*6^1/2| a﹐b﹐c﹐d為有理數}﹐
則 (1) A Ì K (2) K Ì A (3) B Ì K (4) K Ì B (5) B = K﹒
請老師詳解謝謝 !!