ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 521:

• JAMB 2011

If \(\begin{vmatrix} 2 & 3 \\ 5 & 3x \end{vmatrix}\) = \(\begin{vmatrix} 4 & 1 \\ 3 & 2x \end{vmatrix}\), find the value of x.

A. -6
B. 6
C. -12
D. 12

Question 522:

• JAMB 2011

Evaluate \(\begin{vmatrix} 4 & 2 & -1 \\ 2 & 3 & -1 \\ -1 & 1 & 3 \end{vmatrix}\)

A. 25
B. 45
C. 15
D. 55

Question 523:

• JAMB 2011

The inverse of matrix N = \(\begin{vmatrix} 2 & 3 \\
1 & 4\end{vmatrix}\) is

A. \(\frac{1}{5}\) \(\begin{vmatrix} 2 & 1 \\ 3 & 4\end{vmatrix}\)
B. \(\frac{1}{5}\) \(\begin{vmatrix} 4 & -3 \\ -1 & 2\end{vmatrix}\)
C. \(\frac{1}{5}\) \(\begin{vmatrix} 2 & -1 \\ -3 & 4\end{vmatrix}\)
D. \(\frac{1}{5}\) \(\begin{vmatrix} 4 & 3 \\ 1 & 2\end{vmatrix}\)

Question 524:

• JAMB 2011

The sum of four consecutive integers is 34. Find the least of these numbers

A. 7
B. 6
C. 8
D. 5

Question 525:

• JAMB 2012

Make 'n' the subject of the formula if w = \(\frac{v(2 + cn)}{1 - cn}\)

A. \(\frac{1}{c}(\frac{w - 2v}{v + w})\)
B. \(\frac{1}{c}(\frac{w - 2v}{v - w})\)
C. \(\frac{1}{c}(\frac{w + 2v}{v - w})\)
D. \(\frac{1}{c}(\frac{w + 2v}{v + w})\)