x^2+(y^2+1)/2-1/2=1x^2+(y^2+1)/2=3/2又因为x^2+(y^2+1)/2≥2×根号<x^2×(y^2+1)/2>则通过左右项移动,最后可得到,即结果为x×根号(y^2+1)≤3×根号2/4