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
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 02:29:47
已知实数xyz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xyz满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z
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/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值
令x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3=m
则x=(x+1)m,y=(y+2)m,z=(z+3)m,x+y+z=3m
前三式相加得,x+y+z=(x+y+z+6)m,将x+y+z=3m
代入求得m=0或m=-1
所以x+y+z=0或-3
是初二的话,该用初二的一个知识点
因为b/a=c/d 所以b/a=c/d=(b+c)/(a+d) 用这个知识点的话也快
你自己可以试一下,非常的不错的
推荐用三角函数法:
令x=1+2sint,y=2cost,z=x-2y
z=x-2y=1+2sint-4cost1=1+2根号5sin(t-u),u=arctan2
zmax=1+2根号5,zmin=1-2根号5
0或-2
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(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/(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=2根号x-1+2根号y-1+2根号z-1求X+2Y+3Z
已知实数X,Y,Z,满足X^2-2X+Y=Z-1,且X+Y^2+1=0,试比较X,Y,Z的大小.
已知实数x,y满足约束条件x+y=1,y>=1,则z=y/x的最小值
已知实数x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求x2/(y+z)+y2/(z+x)+z2/(x+y)的值
已知实数x,y,z满足2|x-y|+√2y+z+z2-z+1/4=0求x+y+z的值
已知正实数x,y,z 满足2x(x+1/y+1/z)=yz,,则(x+1/y)(x+1/z) 的最小值为 .
已知实数x,y,z满足2x(x+1/Y+1/Z)=yz,则(x+1/Y)(X+1/Z)的最小值
已知实数xyz满足x/y+z+y/z+x+z/x+y=1求x^2/y+z+y^2/z+x+z^2/x+y的值 纠正下!:已知实数xyz满足(x/y+z)+(y/z+x)+(z/x+y)=1求(x^2/y+z)+(y^2/z+x)+(z^2/x+y)的值
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+z=7,
已知实数x,y,z满足x+y+z=1,x^2+y^2+z^2=1/2求X,Y,Z∈{0,2/3},已知实数x,y,z满足x+y+z=1,x^2+y^2+z^2=1/2求证X,Y,Z∈{0,2/3},
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