明星大侦探吴磊:(x-1/x-y)^2-(x+1/x-y)^2 的答案是-4x/(x-y)^2 吗
来源:百度文库 编辑:中科新闻网 时间:2024/04/28 11:26:30
怎么得的?
2/(x-y)+x/y-1/x
1/4(x+y)+1/2(x+y)*(x+y)>=x*根号y+y*根号x
(x+y)2-4(x+y-1)
已知X+Y=-4,求1/2(X+Y)+4(X-Y)-3(X-Y)-3/2(X+Y)-X+Y
1/2x — x+y 乘以 ( x+y/2x — x-y )
如果x和y互为倒数.求:(1).x*x*x+2y*y*x*x+x*y*y*y (2).x*x*x-x*y+y*y*y (要有过程)
x, y>0。求证x/y+y/x+xy>x+y+1
求1/4(x+y)+1/2(x+y)*(x+y)的最值
x^2+y^2+1/2=x+y,则x= ,y= .
Y=2x^2-x/2x-1(x>0.5