X+Y+根号(X^2+Y^2 )=1,用X代表Y,麻烦详细些,
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
y=xarcsin(x/2)+根号(4-x平方),求导数,麻烦写详细点,
求y=1减根号下x^2+1的极值麻烦写详细过程.
y=2x*(*代表X)
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于
计算:(2/3x根号下9x+6x根号下y/x)+(y根号下x/y-x的平方根号下1/x)=
已知x平方+y平方-2y+1=0,求(根号x+根号y+3)/((根号xy+y)(3根号x+根号y))
已知x =2y 化简(根号y/根号x -根号y )-(根号y/根号x +根号y)
已知x=2y,化简根号y/(根号x-根号y)-根号y/(根号x+根号y)
已知x=2y,化简:根号y/根号x -根号y -根号y/根号x +根号y
已知y=根号1-x+根号x-1+3,求根号x+根号y分之x+2根号xy+y+根号x-根号y分之一的值
已知x=2+根号3,y=2-根号3,计算代数式(x+y/x-y-x-y/x+y)乘以(1/x^2-1/y^2)