ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 476:

• JAMB 2008

Solve the quadratic inequalities x² - 5x + 6 ≥0

A. X ≤ 2, x ≥ 3
B. X ≤ 3, x ≥ 2
C. X ≤ -2, x ≥ -3
D. X ≤-3, x ≥ 2

Question 477:

• JAMB 2008

The fifth term of an A.P is 24 and the eleventh term is 96. Find the first term.

A. 12
B. 4
C. -12
D. -24

Question 478:

• JAMB 2008

A binary operation * is defined on the set of positive integers is such x*y = 2x-3y+2 for all positive integers x and y. The binary operation is

A. Commutative and close on the set of positive integers
B. Neither commutative nor closed on the set of ppositive integers
C. Commutative but not closed on the set of positive integers
D. Not cummutative but closed on the set of positive integers

Question 479:

• JAMB 2008

A binary operation on the real set of numbers excluding -1 is such that for all m, n ∈ R, mΔn = m+n+mn. Find the identity element of the operation.

A. 1
B. Zero
C. -¹/₂
D. -1

Question 480:

• JAMB 2008

Find the values of x and y respectively if
\(\begin{pmatrix} 1 & 0 \\ -1 & -1\\ 2 & 2 \end{pmatrix}\) + \(\begin{pmatrix} x & 1 \\ -1 & 0\\ y & -2 \end{pmatrix}\) = \(\begin{pmatrix} -2 & 1 \\ -2 & -1\\ -3 & 0 \end{pmatrix}\)

A. -3, -2
B. -5, -3
C. -2, -5
D. -3, -5