已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z

已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z 已知实数x,y,z满足x+y=5,z^2=xy+y-9,那么x+2y+3z=?我很着急 已知实数x,y,z满足x+y=5,z^2=xy+y-9,那么x+2y+3z=? 已知实数x、y、z满足x＋y=5,z的平方=xy+y-9,那么x+2y+3z=( ) 已知实数x,y,z满足x=6-y,z^2=xy-9,求证：x=y 已知实数x,y,z满足x=6-y,z²=xy-9,求证：x=y 已知实数x,y,z满足x+y=6,z的平方=xy-9,求证x=y 已知x,y,z均为实数,且满足:x+2y-z=6,x-y+2z=3.求x+y+z的最小值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x、y、z,满足x+y+z=7, 已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值 已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值. 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 已知实数x .y.z.满足2^x=3^y=6^z 求证:xy+yz=xz 当x+y+z不等于零,求(x+y)/z的值,并写出一组满足条件的x,y,z的数值.已知x,y,z为实数,x/(y+z)=y/(z+x)=z/(x+y). 已知实数X.Y.Z满足(Y+Z)分之X+(Z+X)分之Y+(X+Y)分之Z=1,则(Y+Z)分之X平方+(Z+X)分之Y平方+(X+Y)分之Z平方的值为（ ） 已知实数xyz满足x+y=5 z的平方=xy+y-9那么x+2y+3z=多少