A matrix can be reduced to row echelon form. Then it can be further reduced to reduced row echelon form. Both the row echelon form and the reduced row echelon form are extremely useful in applications such as solving a system of linear equations. Numerical techniques such as the Gauss-...
Performing Gaussian elimination on a matrix, we will obtain the reduced row echelon form by starting with the first nonzero entry on the first column, doing row operations to obtain zeros under the first nonzero entry. Next, we create the second pivot, by choosing the first nonzero on the...
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求矩阵的解,A为4阶魔方阵,。【提示】由rref可以看出A不满秩,b不在A的值空间中,方程没有准确解。但可求最小二乘近似解。【目的】A不满秩,b不在A的值空间中,方程没有准确解。【解答】(1)借助增广矩阵用指令rref求解
Excel单元格的高度宽度要怎么样设置 首先,可以将鼠标放到单元格顶部字母边线或左侧数字上,然后按住左键不放拖动鼠标,直接调整单元格的大小;其次,也可选中需要调整行高的一行或多行,右键选择【行高】,即可指定选定行的高度。 推荐度: 点击下载本文文档为doc格式 ...