3x+2y+z=39 2x+3y+z=34 x+3y+3z=26
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/01 07:26:35
3x+2y+z=392x+3y+z=34x+3y+3z=263x+2y+z=392x+3y+z=34x+3y+3z=263x+2y+z=392x+3y+z=34x+3y+3z=263x+2y+z=39
3x+2y+z=39 2x+3y+z=34 x+3y+3z=26
3x+2y+z=39 2x+3y+z=34 x+3y+3z=26
3x+2y+z=39 2x+3y+z=34 x+3y+3z=26
3x+2y+z=39 ……① 2x+3y+z=34……② x+3y+3z=26 ……③
①-②得x-y=5……④
①×3-③得8x+3y=91……⑤
解④和 ⑤组成的方程组得x=106/11,y=51/11代人②得z=9/11
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
证明 :x/(y+z)+y/(z+x)+z/(x+y)>=3/2其中 x,y,z>0
x/2=y/3=z/5 x+3y-z/x-3y+z
x+2y=3x+2z=4y+z 求x:y:z
x+y/2=z+x/3=y+z/4 x+y+z=27
若x+y+z=3y=2z,则x/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x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
已知x,y,z 大于0,x+y+z=2,求证 xz/y(y+z)+zy/x(x+y)+yx/z(z+x)大于等于2/3
x+y+z=6 x+2y+3z=14 y+1=z
X/10=Y/8=Z/9,则X+Y+Z/2Y-3Z
解方程 x+y+z=0 4x+2y+z=3 9x-3y+z=28解方程x+y+z=04x+2y+z=39x-3y+z=28
X=3z X+y+z=12 X+2y-2z=10
2x+z=10 x+y-z=4 3x-y-z=0
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值