代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy

代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy 已知y=2x,x=3(y+x),试用含有x的代数表示x+y+z? 初二竞赛代数若在方程x(x+y)=z+120,x,y,z都为质数,且z是奇数,求x,y,z 不定方程：x+10y+50z=500 x,y,z的和等于100,求x,y,z分别是多少?代数 代数不等式（1）设x,y,z为正实数求证 3（x^3*y+y^3*z+z^3*x)= x-y/(z-x)(z-y) 一y-z/(x-y)(x-z) ＋z-x/(y-z)(y-x) x^-(y-z)^/(x+y)^-z^ 计算（x+y-z)(x-y-z) 计算：(x-y+z)(-x+y+z) (x+y-z)(x-y+z)= z/(x-y) × y/(x+y) x y y ...y z x y ...y z z x ...y ........z z z ...x 求解行列式. 已知方程组{x-2y+4z=0,2x+3y-13z=0,且xyz≠0,求代数x+y+z/x+y-z的值 一道代数题求解如何通过条件x+y+z=2,x^2+y^2+z^2=2得出 x(1-x)^2=y(1-y)^2=z(1-z)^2 x/y>0,y/z x+y>z 0 用乘法公式计算(x+y)(x-y)+(-y-z)(-y+z)+(-x+z)(z+x) 计算：（X+y+z)(-x+y+z)(x-y+z)(x+y-z)