First Principles AI

school

11TH · MATH

Question 5

menu_bookSolution menu_bookTheory menu_book•(i)

\left|\begin{matrix}2&1&x\\-1&-4&-3\\x&1&0\end{matrix}\right|=5

menu_book•(ii)

\left|\begin{matrix}1&x-1&3\\-1&x+1&2\\2&-3&x\end{matrix}\right|=9

menu_book•(iii)

\left|\begin{matrix}1&1&1\\2&x&2\\3&6&x\end{matrix}\right|=0

school

11TH · MATH

Question 5

menu_bookSolution menu_bookTheory menu_book•(i)

\left|\begin{matrix}2&1&x\\-1&-4&-3\\x&1&0\end{matrix}\right|=5

menu_book•(ii)

\left|\begin{matrix}1&x-1&3\\-1&x+1&2\\2&-3&x\end{matrix}\right|=9

menu_book•(iii)

\left|\begin{matrix}1&1&1\\2&x&2\\3&6&x\end{matrix}\right|=0

Accedmychevron_right11thchevron_rightmathchevron_rightMatrices And Determinantschevron_rightExercise 4.2

(iii)

\boxed{x=2\ \text{or}\ x=3}

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