示例
解题步骤 1
解题步骤 1.1
Consider the corresponding sign chart.
解题步骤 1.2
The cofactor is the minor with the sign changed if the indices match a position on the sign chart.
解题步骤 1.3
The minor for is the determinant with row and column deleted.
解题步骤 1.4
Multiply element by its cofactor.
解题步骤 1.5
The minor for is the determinant with row and column deleted.
解题步骤 1.6
Multiply element by its cofactor.
解题步骤 1.7
The minor for is the determinant with row and column deleted.
解题步骤 1.8
Multiply element by its cofactor.
解题步骤 1.9
Add the terms together.
解题步骤 2
将 乘以 。
解题步骤 3
将 乘以 。
解题步骤 4
解题步骤 4.1
可以使用公式 求 矩阵的行列式。
解题步骤 4.2
化简行列式。
解题步骤 4.2.1
化简每一项。
解题步骤 4.2.1.1
将 乘以 。
解题步骤 4.2.1.2
将 乘以 。
解题步骤 4.2.2
从 中减去 。
解题步骤 5
解题步骤 5.1
将 乘以 。
解题步骤 5.2
将 和 相加。
解题步骤 5.3
将 和 相加。