# Inverse matrix and basis of subspace

I need your help with 2 tasks. I totally do not know how to do them.

```
For matrix A, find the inverse matrix by fetching to echelon form. Use the block matrix() function to connect the matrices. Matrix is:
```

1 3 0 -1/ 0 2 1 3/ 3 1 2 1 / -1 2 0 3

```
Consider a subspace S generated by vectors:
```

v1=[1,0,3],v2=[0,2,2],v3=[1,-2,0].

Are they a basis of the subspace S?

I need code, because I haven't got a clue how to do that. Please, help