y=x
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/09/14 08:33:46
y=
x
设x2-x+1=t,(x-
1 2)2+ 3 4=t故t≥ 3 4 ∴y= x2−x+1 2x2−2x+3= t 2t+1= 1 2+ 1 t< 1 2, 当t= 3 4时 1 t最大,则y最小,最小值y= 1 2+ 1 t= 3 10, 故y= x2−x+1 2x2−2x+3的值域为[ 3 10, 1 2). 故答案为:[ 3 10, 1 2).
二元函数f(x,y)=x+y/x-y,求f(y/x,x/y)
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
) y=cos(x-y)
x+y=5; x^y+y^x=17
因式分解下列式子:x(x-y)+y(y-x)=?
根据x+x+x+y+y=54,x+x+y+y+y=56,求出x.y的值
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
求y'=y/(y-x)
(x+y-z)(x-y+z)=
(x-y)(x+y)(xx-yy)=?
y'-2y=(e^x)-x
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