Jamb Mathematics 1980 Past Questions and Answers

Question 26:

• JAMB 1980

What will be the value of k so that the quadratic equation kx² - 4x + 1 = 0 has two equal roots?

A. 2
B. 3
C. 4
D. 8
E. \(\frac{1}{4}\)

Question 27:

• JAMB 1980

Find the solution of the equation x + 2\(\sqrt{x - 8}\) = 0

A. (4, 16)
B. (2, 4)
C. (4, 1)
D. (1, 16)
E. (16, 16)

Question 28:

• JAMB 1980

If it is given that 5^{x + 1} + 5^x = 150, then the value of x is equal to

A. 3
B. 4
C. 1
D. 2
E. \(\frac{1}{2}\)

Question 29:

• JAMB 1980

Solve the system of equation 2^{x + y} = 32, 3^{3y - x} = 27

A. (3, 2)
B. (-3, 2)
C. (3, -2)
D. (-3, -2)
E. (2, 2)

Question 30:

• JAMB 1980

Simplify the given expression \(\sqrt{\frac{1 - cos x}{1 + cos x}}\)

A. \(\frac{1 - cos x}{sin x}\)
B. 1 - cos x
C. Sin x
D. 1 + cos x
E. \(\frac{1 + cos x}{sin x}\)