x+y+z=14,x'+y'+z'=15,(x-x')+(y+y')+z*z'=16,已知xyz为自然数,求x,y,z的值?x',y',z'也可以是A,B,C,就是未知数··
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/10 07:42:24
x͑N@_ 3i]Iʹ+%Dh!B4@g+_KMܘp7s9=Ȥ(mjk"l!l#S['qBQ-(%\V7zZ6NEOAY"b!b#T&;dmvj0`]LcP j&eu|xKmDF-ù/cݫ0=~ewآz]w'mF@_]ު7
/Z1\X$/Ssu(
tSӓڪ[ԁvt"7Qf ;0b7
fangchengzu:X+Z=Y 7Z=X+Y+Z X+Y+Z=14
(x+y-z)(x-y+z)=
X+Y+Z=?
x/y=(x+z)/(y+z)y/z=(x+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)=?
(y+z)/x=(z+x)/y=(x+y)/z求x+y-z/x+y+z的值
x+y+z=14 7z=x+y+2 x+z=y
14x+4y+z=200,x+y+z=100求解x,y,z
x+y+z=15 x+5y+10z=70 x,y,z,各是几?
x+y+z=15 x+5y+10z=70 x,y,z,各是几?
X+Y-Z=15 X+5Y+10Z=70 求:X、Y、Z
(1)X+Y=15,Y+Z=-6,Z+X=7.(2)X+Y=-14,Y+Z=-7,Z+X=9.(3)X+Y=0,Y+Z=-1,Z+X=-1.
x+y=-13 y+z=-15 z+x=-14求X Y Z的值
x+y+z=6 x+2y+3z=14 y+1=z
X+Y+Z=15 X+5Y+10Z=70,Y.Z的值
z+=x>y?++x:
用行列式的性质证明:y+z z+x x+y x y z x+y y+z z+x =2 z x y z+x x+y y+z y z x 这个怎么证?
x=y; y=z; z=x/y