设A可逆，对（A|E）进行初等行变换，将A化为单位阵，即（E|B)，则B就是A的逆矩阵。这叫做用初等变换求逆矩阵，可以用这种方法求。

.应用分块矩阵的性质求逆矩阵。但是基本的矩阵逆还是要用初等变换求

-Let A reversible, right (A | E) for elementary row transformation into units of the A matrix, namely (E | B), then B is the inverse of A. This is called the inverse matrix by elementary transformation, you can use this method requirements.

Application of block matrix inverse matrix properties. But the basic matrix inversion or use elementary transformation