Jamb Mathematics Past Questions and Answers

Question 676:

• JAMB 1982

The graphical method of solving the equation x3 + 3x2 + 4x - 28 = 0 is by drawing the graphs of the curves

A. Y = x³ and y = 3x² + x - 28
B. Y = x³ + 3x² + 4x + 4 and the line y = \(\frac{28}{x}\)
C. Y = x³ + 3x² + 4x and y
D. Y = x² + 3x + 4 and y = \(\frac{28}{x}\)
E. Y = x² + 3x + 4 and line y = 28x

Question 677:

• JAMB 1982

Write the equation 2 log2x - x log2(1 + y) = 3 in a form not involving logarithms

A. 2^x(1 + y) = 3
B. 2^x - x(1 + y) = 8
C. X² = 8(1 + y)^x
D. X² - x(1 + y) = 8
E. X² - (1 + y)² = 8

Question 678:

• JAMB 1982

Find \(\alpha\) and \(\beta\) such that x\(\frac{3}{8}\) x y\(\frac{-6}{7}\) x (\(\frac{y^{\frac{9}{7}}}{x^{\frac{45}{8}}}\))\(\frac{1}{9}\) = \(\frac{y^{\alpha}}{y^{\beta}}\)

A. \(\alpha\) = 1, \(\beta\) = \(\frac{5}{7}\)
B. \(\alpha\)= 1, \(\beta\) = -\(\frac{5}{7}\)
C. \(\alpha\)= \(\frac{3}{5}\), \(\beta\) = -6
D. \(\alpha\)= 1, \(\beta\) = -\(\frac{3}{5}\)

Question 679:

• JAMB 1982

Which of the following lines is not parallel to the line 3y + 2x + 7 = 0?

A. 3y + 2x - 7 = 0
B. 9y + 6x + 17 = 0
C. 24y + 16x + 19 = 0
D. 3y - 2x + 7 = 0
E. 15y + 10x - 13 = 0

Question 680:

• JAMB 1982

What is the least possible value of \(\frac{9}{1 + 2x^2}\) if 0 \(\geq\) x \(\geq\) 2?

A. 9
B. 5
C. 1
D. 2