(3+1)(3x3+1)(3x3x3x3+1)(3x3x3x3x3x3x3x3+1)

(3+1)(3x3+1)(3x3x3x3+1)(3x3x3x3x3x3x3x3+1) 2x(3+1)x(3x3+1)x(3x3x3x3+1)x(3x3x3x3x3x3x3x3+1)+1=?急 注：x是乘号, X3-3X+1=0 求X3+1/X3 若x+1/x3=3,为什么x3+1/x3的值等于18 试用克拉默法则求下列线性方程组的解 x1+x3=1;2x1+2x2+3x3=3;x2+x3=-1x1+x3=12x1+2x2+3x3=3x2+x3=-1 (-5)x3又3分之1+2x3又3分之1+(-6)x3又3分之1 解方程组 X1-X2-4X3=-1 X2+X3=2 X1+X2-2X3=3线性代数 2x3-3x+三分之二x3-2x-三分之四x3+x-1,其中x=-二分之一 (-1/3)^-3x3^-1计算 2x3+3x2-4x-1 x3-x2-3x-1 化简 6,若点A(x1,1),B(x2,2),C(x3,-3)在双曲线上,则( ) A,x1>x2>x3 B,x1>x3>x2 C,x3>x2>x1 3+3x3—9+1x3十20一20x7一3= x2+3x+1=0,求x3+1/x3与x7+1/x7的值. maxz=3x1+4x2+x3 -1+2x2+3x3 0.99999...=0.33333...X3=1/3X3=1,这个等式对吗?请说明理由 已知x2-3x+1=0,求x3+1/x3的值 已知x2-3x=1 =0,求x3+1/x3