1x1-2x2+3x3-4x4******+99x99-100x100+101x101的过程
1x1-2x2+3x3-4x4+5x5-6x6.-100x100+101x101
求1x2,2x3,3x4,4x5,……98x99,99x100的倒数和
1/1x2+1/2x3+1/3x4+1/4x5+.+1/98x99+1/99x100
1/1X2+1/2x3+1/3x4+1/4x5+.+1/98x99+1/99x100求结果!
2/1x2+2/2x3+2/3x4+2/4x5+...+2/98x99+2/99x100
计算1x2+2x3+3x4+4x5+...+99x100
已知x4+x3+x2+x+1=0,求x100+x99+x98+x97+x96的值.
1x2+2x3+3x4+4x5······100x101答案是几?
求齐次线性方程组x1+x2+2x3-x4=0,-x1 -3x3+2x4=0,2x1+x2+5x3-3x4的一般解过程可以
求非齐次线性方程组的通解:2x1+x2-x3-x4=1;2x1+x2+x3-x4=1;4x1+2x2+x3-2x4=2
具体写出方程组:2x1+x2-x3+x4=1;x1+2x2+x3-x4=2;x1+x2+2x3+x4=3的通解
1分之1x2+1分之2x3+1分之3x4.+1分之99x100