已知有理数x、y、z满足条件|x-z-3|+(2x-4y-7)^2+(3x+4y-13)^2=0,求x^3n乘y^3n+1乘z^5n+6-x的值
问题描述：
已知有理数x、y、z满足条件|x-z-3|+(2x-4y-7)^2+(3x+4y-13)^2=0,求x^3n乘y^3n+1乘z^5n+6-x的值
答
已知有理数x,y,z满足条件：|x-z-2|+|3x-6y-7|+（3y+3z-4）^2=x =(xyz)^(3n)·(z/y) - x =3·1^3n - 3 =0