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Mathematics 1980 JAMB Past Questions

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21

In triangle FGH, < G = 90º, < H = 60º, while in triangle XYZ, < X = 60º and < Y = 30º. Form XYZ write down the ratio equal to \(\frac{FG}{FH}\)

  • A. \(\frac{YX}{ZX}\)
  • B. \(\frac{YX}{YZ}\)
  • C. \(\frac{ZX}{YZ}\)
  • D. \(\frac{YZ}{XY}\)
View Answer & Discuss (5) JAMB 1980
22
A pentagon has four of its angles equal. If the size of the fifth angle is 60o, Find the size of each of the four equal angles.
  • A. 60o
  • B. 108o
  • C. 120o
  • D. 150o
  • E. None of the above
View Answer & Discuss JAMB 1980
23

Find the product of (2\(\sqrt{y} - 3y\)) and (3y + 2\(\sqrt{y}\))

  • A. 4y = y2
  • B. 4y + 9y2
  • C. 4y - 9y2
  • D. -4y - 9y2
  • E. 2y + y2
View Answer & Discuss (9) JAMB 1980
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24

(\(\frac{x^a}{x^b}\))a + b = (\(\frac{x^{a + b}}{x^{a - b}}\))\(\frac{a^2}{b}\)

  • A. x-a2
  • B. xb2
  • C. xa2 - b2
  • D. \(\frac{1}{x^{a2 + b2}}\)
  • E. xb2 - a2
View Answer & Discuss (7) JAMB 1980
25
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. \(\frac{1}{4}\)
View Answer & Discuss JAMB 1980
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