设3x3-x=1,求9x4+12x3-3x2-7x+2006的值

设3x3-x=1,求9x4+12x3-3x2-7x+2006的值 怎样解设3x2-x=1,求9x4+12x3-3x2-7x+2000的值. 若3x3-x=1,求代数式9x4+12x3-3x2-7x=1314的值 若3x3-x=1,求多项式9x4+12x3-3x2-7x+2006的值 X3-3X+1=0 求X3+1/X3 求非其次线性方程组 X1+X2-3X3-X4=1 3X1-X2-3X3+4X4=4 X1+X2-9X3-8X4=0 若3x3-x=1,则9x4+12x3-3x2-7x+2004的值为 若3x3-x=1,则9x4+12x3-3x2-7x+1999的值为 若X1,X2,X3,X4,X5 满足方程组：2X1+X2+X3+X4+X5=6,①X1+2X2+X3+X4+X5=12 ②X1+X2+2X3+X4+X5=24 ③X1+X2+X3+2X4+X5=48 ④X1+X2+X3+X4+2X5=96 ⑤⑴求X1+X2+X3+X4+X5的值；⑵求3X3+2X4-X5有必要说明一下,凡是跟在X后面的数字都是小 线性代数题,求详解设X1,X2,X3,X4是方程X^4+3X^2+4X+5=0的四个根,求D=| X1 X2 X3 X4 | 的值| X4 X1 X2 X3 || X3 X4 X1 X2 || X2 X3 X4 X1 | x1-x2+x3=1x2-x3+x4=21若x1,x2,x3,x4,x5满足方程组 x3-x4+x5=3x4-x5+x1=4x5-x1+x2=5求x2 x3 x4的值2已知 x1+x4+x6+x7=39 x2+x4+x5+x7=49 x3+x5+x6+x7=41 x4+x7=13 x5+x7=14 x6+x7=9 x1+x2+x3+x4+x5+x6+x7=9求x7的值若x1,x2,x3,x4,x5满足方程组 x1-x 求方程组通解,线性代数问题X1+X2-3X3-X4=13X1-X2-3X3+4X4=1X1+5X2-9X3-8X4=0X后面的全是下标, 求下列非齐次线性方程组的解x1+x2-3x3-x4=13x1-x2-3x3+4x4=4x1+5x2-9x3-8x4=0我已经算到x1+x2-3x3-x4=1-4x2+6x3+7x4=1该怎么分别用x1 x2 x3 x4来表示呢? 求方程组：x1+x2-x3+2x4=3,2x1+x2-3x4 =1,-2x1-2x3+10x4=4(2) X1-4x2+2x3-3x4=114x1+3x2+6x3-x4=-12x1+4x2+2x3+x4=-6 求解一个方程急 X（1次方）+X2+X3=5 X2+X3+X4=1 X3+X4+X5=-5 X4+X5+X1=-3 X5+X1+X2=2 求X的值, 设x3+1/x3=2.求x+1/x 已知X2-X-1=0求,X5-X4-3X3+3X2+X的值 X1+X2-3X3-X4=1 3X1-X2-3X3+4X4=4 X1+5X2-9X3-8X4=0 解线性方程组