Question

obtenha o valor de A para o qual | a -3 4 | | 6 -2 2 | | 8 -1 3 | = 0 ajudem pfv

Answer 1

$\left[\begin{array}{ccc}a&-3&4\\6&-2&2\\8&-1&3\end{array}\right] -64-2a-54+6a+40+24=0 4a+72-118=0 4a-46=0 4a=46   a=46/4   a=11,5$