The following question, can someone tell me if this is the right method of doing it.
If, and , find conditions on a, b and c so the system of equations represented by CX = D has an infinite number of solutions.
previous question asked to find det C =
det C = b +2a-22
i made b=0 to find a which equals 11 therefore det C =0 and c=0 when i made the equation