Question 1199085
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<pre>

I don't know what A(1), A(2), A(3) mean in this problem.

    The composer does not go into such details :)



But if they are introduced in accordance with logic and common sense, then


    y = {{{det(A(2))/det(A)}}} = {{{6/2}}} = 3.    <U>ANSWER</U>
</pre>

Solved.