getInvY

代码说明：

  简单的求逆矩阵中单个元素的程序。 用于求解逆矩阵中的单个元素值，基于定义 使用伴随阵/行列式的值求解 只适用于小矩阵。维数太大行列式的值就计算不出来了(Simple inverse matrix of individual elements in the program. For solving the inverse matrix single element values, with the value of the array/determinant of solving only apply to a small matrix-based definition. Value dimension to calculate the determinant is not too out)