已知x,y,z的倒数成等差数列,且x≠y≠z,则(x-y)/(y-z)等于多少
非零实数X,Y,Z成等差数列,且X+1,Y,Z与X,Y,X+Z都成等比数列则Y等于多少?
已知:(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)
已知实数x,y,z满足:3x-y-3z=0和x-6y+6z=0(z≠0),则代数式x+y+z/x-y+z的值等于
已知整数x,y,z成等差数列,x+y,y+z,z+x成等比数列,且x+y+z∈(40,45),求此三个数
已知:(x+y)/z=(x+z)/y=(z+y)/x,且xyz不等于0,则分式(x+y)(x+z)(z+x)/xyz的值
(x-y+z)(x+y+z)等于多少.
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
非零实数x,y,z成等差数列,x+1,y,z与x,y,x+z都成等比数列,则y等于
已知4x-3y-6z=0,x+2y-7z=0,且x,y,z≠0,求2x+3y+6z/x+5y+5z的值.
设X,Y,Z为实数,2X,3Y,4Z成等比数列,且1/X,1/Y,1/Z成等差数列,则X/Z+Z/X的值是
1.设X ,Y,Z 成等差数列,代数式(X-Z)*(X-Z)+ 4(X-Y)(Z-Y)=
已知有理数x,y,z且|x-3|+|y+1|+(2z+1)^2=0,求x+y+z的相反数的倒数