I do not know how to go about this problem some help would b

I do not know how to go about this problem, some help would be greatly appreciated! And please answer fulfillingly, as a proof.

4. If A is an n × n matrix and k why your formula is correct. R, what is the value of det (kA)? Explain

Solution

nd B be an n n matrix.
1. If B is obtained by replacing one row of A by itself plus a multiple of
another row, then detB = detA
2. If B is obtained by multiplying a row of A by a nonzero constant k, the