1/x+1/y+1/z=a,a,x,y,z,分别等于多少x大于y,y又大于z
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1/x+1/y+1/z=a,a,x,y,z,分别等于多少x大于y,y又大于z
1/x+1/y+1/z=a,a,x,y,z,分别等于多少
x大于y,y又大于z
1/x+1/y+1/z=a,a,x,y,z,分别等于多少x大于y,y又大于z
条件不大够,a,x,y,z都是正整数的话就可以
x=6,y=3,z=2,a=1
已知x,y,z,a为自然数,且x<y<z,1/x+1/y+1/z=a,求x,y,z,a 的值.
已知X,Y,Z,A,为自然数,且X〈Y〈Z,求1/X+1/Y+1/Z=A,求X,Y,Z的值.
1.m(x-y-z)+n(y+z-x)=(x-y-z)*?2.x^2-(a+1)x+a+?3.6x^2+7x+2=?
分解因式 4a(x-y)²-a²(y-x)³ (x+y+z)(x-y+z)+(y-x+z) (y-x-z)(1)4a(x-y)²-a²(y-x)³ (2)(x+y+z)(x-y+z)+(y-x+z) (y-x-z)
已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=?
x+y+z=a 求1/x+1/y+1/z最大
2^x+1(1-a.a^x+y)=2^z-16a^6求x^y+z
2^x+1(1-a.a^x+y)=2^z-16a^6求x^y+z
已知x、y、z均为实数,若X+Y+Z≠0,a=X/X+Y,b=Y/Z+X,c=Z/X+Y,求a/a+1,b/b+1,c/c+1的值
1/x+1/y+1/z=a,a,x,y,z,分别等于多少x大于y,y又大于z
把下列各式因式分解 (1)、a^2(x-y)-4a(y-x)+4(x-y) (2)、(x+y)(x-y)-(x+z)(x-z)
X=a/b+c Y=b/c+a Z=c/a+b求证 x/1+x + y/1+y + z/1+z=1
已知x/y+z=a,y/x+z+b,z/x+y=c,求:a/1+a+b/1+b+c/1+c=1
若x+y+z0,x+y0,y+z0,z+x0,a=x/(y+z),b=y/(x+z),c=z/(x+y) 求证 a/(a+1)+b/(b+1)+c/(c+1)=1.
x+y+z=a,x^2+y^2+z^2=1/2a^2,求x,y,z取值范围已知x,y,z均为实数,a>0,且满足x+y+z=a,x^2+y^2+z^2=1/2 a^2,求x,y,z的取值范围.
若x,y,z都是正实数,且x+y+z=xyz,且1/(x+y)+1/(y+z)+1/(z+x)恒成立,求a的取值范围若x,y,z都是正实数,且x+y+z=xyz,且1/(x+y)+1/(y+z)+1/(z+x)恒成立,求a的取值范围可以用柯西不等式1/(x+y)+1/(y+z)+1/(z+x)
不等式1/(x-y)+1(/y-z)+a/(z-x)>=0对x>y>z恒成立,则a的取值范围
A=y(x-y)(x-z)+z(x-y)(z-x) 问:(1)将多项式A分解因式(2) x/2=y/3=z/4,求A/(xyz)的值