Y=(1+X)^(1/X).求Y'(1)
若x-y=1,求代数式x(x-y)+y(y-x)+2013的值
已知4x=9y求(1)x+y/y (2)y-x/2x
x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y
x+y=1,xy=-1/2,求x(x+y)(x-y)-x(x+y)2
已知x+y=1,xy=-二分之一,求x(x+y)(x-y)-x(x+y)²
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
一条分式数学题已知x y z满足x/x+y + y/z+x + z/x+y =1,求x²/x+y + y&su
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
Y=(1+X)^(1/X).求Y'(1)
已知实数x,y满足方程x*x+y*y-4x+1=0.求y-x的最大值
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&