08/08/06 00:47:33
>>661
f+1/2 = {x^2+y^2+z^2+2(xy+yz+zx)}/2{x^2+y^2+z^2}
= {(x+y+z)^2}/2{x^2+y^2+z^2}
≧ 0
08/08/06 00:47:33
>>661
f+1/2 = {x^2+y^2+z^2+2(xy+yz+zx)}/2{x^2+y^2+z^2}
= {(x+y+z)^2}/2{x^2+y^2+z^2}
≧ 0
08/08/06 00:47:33
>>661
f+1/2 = {x^2+y^2+z^2+2(xy+yz+zx)}/2{x^2+y^2+z^2}
= {(x+y+z)^2}/2{x^2+y^2+z^2}
≧ 0