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Mathematics 1982 JAMB Past Questions

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6

The solution of the quadratic equation bx\(^2\) + cx + a = 0 is given by

  • A. x = b \(\pm\) \(\frac{\sqrt{b^2 - 4ac}}{2a}\)
  • B. x = c \(\pm\) \(\frac{\sqrt{b^2 - 4ab}}{2b}\)
  • C. x = -c \(\pm\) \(\frac{\sqrt{c^2 - 4ab}}{2b}\)
  • D. x = -b \(\pm\) \(\frac{\sqrt{b^2 - 4ac}}{2b}\)
View Answer & Discuss (7) JAMB 1982
7

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
View Answer & Discuss (2) JAMB 1982
8

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

  • A. 2x(1 + y) = 3
  • B. 2x - x(1 + y) = 8
  • C. x2 = 8(1 + y)x
  • D. x2 - x(1 + y) = 8
  • E. x2 - (1 + y)2 = 8
View Answer & Discuss JAMB 1982
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9

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

  • A. \(\alpha\) = 1, \(\beta\) = \(\frac{5}{7}\)
  • B. \(\alpha\)= 1, \(\beta\) = -\(\frac{5}{7}\)
  • C. \(\alpha\)= \(\frac{3}{5}\), \(\beta\) = -6
  • D. \(\alpha\)= 1, \(\beta\) = -\(\frac{3}{5}\)
View Answer & Discuss (6) JAMB 1982
10

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
View Answer & Discuss (3) JAMB 1982
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