1.mx+y+z=m+1 x+my+z=m+2 x+y+mz=m+3 2.(m+1)x-(2m-1)y=3m (3m+1)x-(4m-1)y=5m+4

1.mx+y+z=m+1x+my+z=m+2x+y+mz=m+32.(m+1)x-(2m-1)y=3m(3m+1)x-(4m-1)y=5m+4 1.mx+y+z=m+1 x+my+z=m+2 x+y+mz=m+3 2.(m+1)x-(2m-1)y=3m (3m+1)x-(4m-1)y=5m+4 mx+my+mz=y nx+ny+nz=z 已知：m、n、x 求：y、zmx+my+mz=ynx+ny+nz=z已知：m、n、x求：y、z 1.已知方程组3x+y=1+3m ,x+3y=1-m 的解满足x+y>0,求m的最小正整数的值2.关于x,y的方程组(a-1)x+y=5,x+y=b有唯一解x=α,y=β 求α+β.3.解方程组 (1)mx+y+z=m+1x+my+z=m+2x+y+mz=m+3(2)(xy+x)/(x+y+1)=2(xz+2x)/(x+z+2)=3(y+1)(z+2)/(y 解方程组{x+y=8,y+z=6,z+x=4 求mx+2y-z的2009次方=10,求 m 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)=? 计算下面的分式题.急,我是初一的,1、(y-z)(z-x)/[(x+z-2y)(x+y-2z)]+(z-y)(x-z)/[(x+y-2z)(y+z-2x)+(x-z)(y-z)]/[(y+z-2x)(x+z-2y)]2、若a/b=b/c=c/d=d/a,则(a-b+c-d)/(a+b-c+d)的值.3、若x/(x^2-mx+1)=1,求x^3/(x^6-m^3x^3+1)的值.4、如果 1.m(x-y-z)+n(y+z-x)=(x-y-z)*?2.x^2-(a+1)x+a+?3.6x^2+7x+2=? 设m>1,在约束条件{y大于等于x；y小于等于mx；x+y小于等于1}的条件下,目标函数z=x+my的最小值小于2,求m的取值范围 设m>1,在约束条件y≥x,y≤mx,x+y≤1下,目标函数z=x+my的最大值小于2,则m的取值范 m为何正整数时,方程组mx+y+z=0 3mx+（m-1）y+（2m-1）z=0 2mx+3y+（m+3）z=0 1.已知x=2,y=-1是方程mx+ny=1,nx+my=6的解求m+n的值.2.已知2x-y=7,ax+y=b和x+by=8,3x+y=8有相同的解,求a,b的值.2x+y-z=2,x+2y=5,x-y+2z=-7（解方程具体步骤） (x+y-z)(x-y+z)= 1.设有比例式：x/(y+z)=y/(x+z)=z/(x+y),有比例性质,得x/(y+z)=y/(x+z)=z/(x+y)=（x+y+z)/[(y+z)+(x+z)+(x+y)]=0.5x/(y+z)=y/(x+z)=(x-y）/[（y+z）-（x+z)]=-1,由此可得0.5=-1试分析推理产生错误的原因 求曲线Y^2=2mx Z^2=m-x在点（x.y.z.）处的切线及法平面方程 (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-z=11 y+z-x=5 z+x-y=1 {x+y-z=11,x-y-z=-5,x-y+z=1