2=1x2.2+4=6=2x3,2+4+6=12+3x4,2+4+6+8=20=4x5……那么2010+2012+201

求齐次线性方程组x1+2x2+x3+x4+x5=1 2x1+4x2+3x3+x4+x5=2 -x1-2x2+x3+3x4 1分解因式：2x4-x3-13x2-15=?2.分解因式：x5+x4+x3+x2+x+1=?3分解因式：x4-4x2+6 简单线代题///X1+X2+X3+X4+X5=13X1+2X2+X3+X4+3X5=0 X2+2X3+2X4+6X5=3 求线性方程组的全部解x1+x2-3x4-x5=2x1-x2+2x3-x4=14x1-2x2+6x3+3x4-4x5=82 若X1~X5满足下列方程组：2乘X1+X2+X3+X4+X5=6,X1+2乘X2+X3+X4+X5=12,X1+X2+2 解方程组X2+X3+X4=1 X1+X2+X3=5 X3+X4+X5=-5 X4+X5+X1=-3 X5+X1+X2=2 (2X2)/1X3+(4X4)/(3X5)+(6X6)/(5X7)+...+(20X20)/(19X21)==? 1/1x2+1/2x3+1/3x4+1/4x5+```````+1/2008x2009=? 1/1x2+1/2x3+1/3x4+1/4x5.1/2005x2006=? X1 - X3 - X4 -5X5=0 X1+2X2+3X3+3X4+7X5=0 X1+X2+X3+X4+X5=0 X2 关于二元一次方程组若X1,X2,X3,X4,X5满足下列方程组:2X1+X2+X3+X4+X5=6X1+2X2+X3+X 2=1x2 2+4=6=2x3 2+4+6=12=3x4 2+4+6+8=20=4x5