16/07/07 17:17:18.77 qeaoYgad.net
>>608 >>610
CRT（ブラウン管）を使うと、
(XX-XY+YY)/(XX+XY+YY)
= 1 - 2XY/(XX+XY+YY)
≧ 1 - 2XY/(3XY)
= 1/3,
x^3/(xx+xy+yy)
= x - xy(x+y)/(xx+xy+yy)
≧ x - xy(x+y)/(3xy)
= x - (x+y)/3
= (2x-y)/3,
16/07/07 17:17:18.77 qeaoYgad.net
>>608 >>610
CRT（ブラウン管）を使うと、
(XX-XY+YY)/(XX+XY+YY)
= 1 - 2XY/(XX+XY+YY)
≧ 1 - 2XY/(3XY)
= 1/3,
x^3/(xx+xy+yy)
= x - xy(x+y)/(xx+xy+yy)
≧ x - xy(x+y)/(3xy)
= x - (x+y)/3
= (2x-y)/3,