若y=√x-5+√5-x+2,求3x+5y的平方根

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/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 若x>o,y>o,且根号x(根号x+根号y)=3根号y(根号x+5根号y)求x+根号xy分之2x-根号xy-5y式子是√x（√x+√y）=3√y（√x+5√y），求x+√xy分之2x-√xy-5y y=x^5+√x+1/x^3 ,求导数结果是y’=2x-5/2x^-7/2-3x^-4,对y求导数 已知:3x-5y=0,求x/y,x-y/y,x-y/x 已知4x²+y²-4x-6y+10=0求（2/3x（√9x）+(y²√x/y³)×(x²√1/x×5x√y/x)的值 已知4x²+y²-4x-6y+10=0求（2/3x（√9x）+(y²√x/y³)-(x²√1/x-5x√y/x)的值 已知4x²+y²-4x-6y+10=0,求[(2/3)x√(9x)+y²√(x/y³)-(x²√(1/x)-5x√(y/x)的值 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. √x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 已知：x*x+√3y=√5,y*y+√3x=√5,且x≠y,求 y/x+x/y 若实数X,Y满足x²+y²-4x-2y+5=0求√x+y/√8y-2x 若（3x-y+5）²+√2x-y+3=0,求x-y的值 若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值 若x+y分之x-y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值 若x-y分之x+y=3,求式子x+y分之5(x-y)—2（x-y）分之x+y的值 若x、y为整数,√x（√x+√y）=3√y（√x+5√y),试求2x+(√xy)+3y除以x+(√xy)+y