ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 456:

• JAMB 2006

Find p, q for which \(\begin{pmatrix} 2p & 8 \\ 3 & -5q \end{pmatrix}\)\(\begin{pmatrix} 1 \\ 2\end{pmatrix}\)\(\begin{pmatrix}24 \\ -17\end{pmatrix}\)

A. -4
B. 45
C. 4,2
D. 2

Question 457:

• JAMB 2006

If x = \(\begin{pmatrix} 1 & 0 & 1 \\ 2 & -1 & 0 \\ -1 & 0 & 1\end{pmatrix}\) and y = \(\begin{pmatrix} -1 & 1 & 2 \\ 0 & -1 & -1 \\ 2 & 0 & 1\end{pmatrix}\)
find 2x - y

A. \(\begin{pmatrix} 3 & -1 & 0 \\ 4 & -3 & -1 \\ -4 & 1 & 1\end{pmatrix}\)
B. \(\begin{pmatrix} 3 & -1 & 0 \\ 4 & -1 & 1 \\ -4 & 1 & 1\end{pmatrix}\)
C. \(\begin{pmatrix} 3 & -1 & 0 \\ 4 & -3 & 1 \\ -4 & 1 & 1\end{pmatrix}\)
D. \(\begin{pmatrix} 3 & -1 & 0 \\ 4 & 1 & 1 \\ -4 & -1 & 1\end{pmatrix}\)

Question 458:

• JAMB 2006

Find the roots of x\(^3\) - 2x\(^2\) - 5x + 6 = 0

A. 1, -2, 3
B. 1, 2, -3,
C. -1, -2, 3
D. -1, 2, -3

Question 459:

• JAMB 2007

A binary operation ⊕ on real numbers is defined by x ⊕ y = xy + x + y for any two real numbers x and y. The value of (-³/₄) ⊕ 6 is

A. ³/₄
B. -⁹/₂
C. ⁴⁵/₄
D. -³/₄

Question 460:

• JAMB 2007

The graph above is represented by

A. Y = x³ - 3x - 2
B. Y = x³ + 2x² - x - 2
C. Y = x³ - 4x² + 5x - 2
D. Y = x³ - 4x + 2