Please help for 100 points
Find a and b so that
[tex]4\left[\begin{array}{ccc}a\\3\end{array}\right] -2\left[\begin{array}{ccc}6\\b\end{array}\right] =0[/tex]
, an additive identity matrix
1.a=3,b=6
2.a=3,b=-6
3.a=-3,b=6
4.a=-3,b=-6