3.25x4.8+6.7x5.2+3.45x4.8用简单方法计算

3.25x4.8+6.7x5.2+3.45x4.8用简单方法计算 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+X4+X5=12X1+X2+2X3+X4+X5=24X1+X2+X3+2X4+X5=48X1+X2+X3+X4+2X5=96则3X4+2X5的值是 多少?(X1,X2.X3.X4.X5的1.2.3.4.5不是乘除和加减,带表5个不同的 3.4X5.3+5.9X4.7+2.5X5.3 求方程组x1+3x2+x3+2x4+4x5=3 2x1-x2+8x3+7x4+2x5=9 4x1+5x2+6x3+11x4+10x5=15的全部解线性代数 matlab线性方程组计算X1+X2-5X3-X4+X5=98X1+5X2-X3+4X5=23X1-7X2-5X3-X4+X5=42X1+X2+8X3+3X4-X5=-86X2+2X3+7X4-2X5=15 1/2x3+1/3x4+1/4x5.+1/8x9+1/9x10 求3.95加1.2x5.2和2.3x4.8x0.5的简便计算, 巧算：1x2+2x3+3x4+4x5+5x6+6x7...+8x9 化简：(1x3)分之一+(2x4)分之一+(3x5)分之一+...+(7x9)分之一+(8x10)分之一 求非齐次线性方程组通解X1+X2+X3+3X4+X5=7 3X1+X2+2X3+X4-3X5=-2 2X2+X3+2X4+6X5=23 8X1+3X2+4X3+3X4-X5=12 求下列非齐性线性方程组的解X1+ X2+ X3+ X4+ X5=32X1+ X2+3X3+3X4+4X5=143X1+4X2+ X3- 3X4+2X5=-11X1- X2+4X3+8X4+4X5=31 x5+x4+1因式分解 x1+x2+x3+x4+x5=2006,求x1^2+x2^2+x3^2+x4^2+x5^2最大值?x1,x2,x3,x4,x5均为正整数 解一道方程组x1+x2+x3=5,x2+x3+x4=1,x3+x4+x5=-5,x4+x5+x1=-3,x5+x1+x2=2 若X1-X5满足下列方程组2乘X1 +X2+X3+X4+X5=6X1+ 2乘X2 +X3+X4+X5=12X1+X2+ 2乘X3 +X4+X5=24X1+X2+X3+ 2乘X4 +X5=48X1+X2+X3+X4+ 2乘X5 =96求3乘X4+X5的值. 用LINGO解最优化问题中程序没有最优解帮看看要怎么改min=7.2*x1+7.2*x3+7.2*x4+7.2*x5+(x3+x4+x5)*21.4834;x1^2=15^2+(5-x5-(x3^2-n^2)^0.5)^2;(5-n)^2+(8-x5)^2=x4^2;n 因式分解X5-X4+2X3-2X2+2X-4 因式分解：x5-3x4+2x3-x2+3x-2