y=√x-3+√3-x+8,求3x+2y的算术平方根.

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) ³√x+y=3,√x-y=2 求x,y的平方根 |x-2y|+√3x-4y =0求x y值 若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求2x+2√x*√y+3y/x-√x*√y+y 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 y=(2x^2-3x+4)/√ x 求y' y=(2x^2-3x+4)除以根号X 求 y' 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² 已知:3x-5y=0,求x/y,x-y/y,x-y/x 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y y=3(x-y),x=2(x-y)求x,y的值 已知：x*x+√3y=√5,y*y+√3x=√5,且x≠y,求 y/x+x/y √x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y 求值域 1.y=-x+x+2,x∈(-1,2] 2.y=8/x-4x+5 3.y=x-2√x求值域1.y=-x+x+2,x∈(-1,2]2.y=8/x-4x+53.y=x-2√x+3 已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y 已知实数x,y满足x+y+2x-2√3y=0,求：㈠x+y的最大值；㈡x+y的最小值? y=x^3-5x^2+2x-8 求y^2求y撇