If A = |(-1,2,4),(3,1,0),(-2,4,2)| and B = |(-2,4,2),(6,2,0),(-2,48)|, then B is given by … (a) B = 4A (b) B = -4A (c) B = -A

Question

If A = \(\begin{vmatrix} -1 &2&4 \\[0.3em]3&1&0\\-2&4&2\end{vmatrix}\) and B = \(\begin{vmatrix} -2&4&2 \\[0.3em]6&2&0\\-2&4&8\end{vmatrix}\), then B is given by …

(a) B = 4A 

(b) B = -4A 

(c) B = -A 

(d) B = 6A

Answer 1

(b) B = -4A

A = \(\begin{vmatrix} -1 &2&4 \\[0.3em]3&1&0\\-2&4&2\end{vmatrix}\)

Now