let, \ T = <br />
\[\begin{bmatrix}<br />
1 & 3 & -7 \\<br />
2 & -1 & 0 \\<br />
3 & -1 & -1\\<br />
4 & -3 & -2<br />
\end{bmatrix}<br />
\]
determine a basis for the (a) range space of T and (b) null space of T

well,i know that Null space of the matrix is the collection of Xs where TX=O
and range of T is the collection of all possible linear combinations of the column vectors of T. from this, how can i get the answers?