Jamb Mathematics 1981 Past Questions and Answers

Question 41:

• JAMB 1981

The sum of the root of a quadratic equation is \(\frac{5}{2}\) and the product of its root is 4. The quadratic equation is

A. X + 8x² - 5 = 0
B. 2x² - 5x + 8 = 0
C. 2x² - 8x + 5 = 0
D. X² + 8x - 5 = 0

Question 42:

• JAMB 1981

Solve the given equation \((\log_{3} x)^{2} - 6(\log_{3} x) + 9 = 0\)

A. 27
B. 9
C. \(\frac{1}{27}\)
D. 18
E. 81

Question 43:

• JAMB 1981

What is the length of an arc of a circle that substends 2\(\frac{1}{2}\) radians at the centre when the raduis of the circle = \(\frac{k}{k + 1}\) + \(\frac{k + 1}{k}\) then

A. P < 0
B. P\(\geq\) 0
C. P \(\leq\) 0
D. P < 1
E. P > 0

Question 44:

• JAMB 1981

In the figure, the chords XY and ZW are produced to meet at T such that YT = WT, ZYW = 40o and YTW = 30o. What is YXW?

A. 50^o
B. 75^o
C. 35^o
D. 115^o
E. 30^o

Question 45:

• JAMB 1981

In the figure, find the area of XYZW

A. 60cm²
B. 54cm²
C. 27cm²
D. 54\(\sqrt{2}\)cm²
E. 27\(\sqrt{2}\)cm²