Matrices and Determinants - Jamb Mathematics Past Questions and Answers

Question 41:

• JAMB 2014

Find y, if \(\begin{pmatrix}5 & -6 \\2 & -7\end{pmatrix}\begin{pmatrix}x \\ y \end{pmatrix} = \begin{pmatrix}7 \\-11\end{pmatrix}\)

A. 8
B. 5
C. 3
D. 2

Question 42:

• JAMB 2014

If \(\begin{vmatrix}-x & 12 \\-1 & 4 \end{vmatrix} = - 12\), find x.

A. -6
B. -2
C. 3
D. 6

Question 43:

• JAMB 2014

Find the value of \(\begin{vmatrix}0 & 3 & 2 \\1 & 7 & 8 \\0 & 5 & 4\end{vmatrix}\).

A. 12
B. 10
C. -1
D. -2

Question 44:

• JAMB 2020

Find the non-zero positive value of x which satisfies the equation

\(\begin{bmatrix} x & 1 & 0 \\ 1 & x & 1 \\ 0 & 1 & x \end{bmatrix}\) = 0

A. 2
B. \(\sqrt{3}\)
C. \(\sqrt{2}\)
D. 1