Mathematics 2019 Past Questions | JAMB

Study the following Mathematics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

21. If given two points A(3, 12) and B(5, 22) on a x-y plane. Find the equation of the straight line with intercept at 2.

  • A. y = 5x + 2
  • B. y = 5x + 3
  • C. y = 12x + 2
  • D. y = 22x + 3

22. If P(2, m) is the midpoint of the line joining Q(m, n) and R(n, -4), find the values of m and n.

  • A. m = 0, n = 4
  • B. m = 4, n = 0
  • C. m = 2, n = 2
  • D. m = -2, n = 4

23. If \(\begin{vmatrix} 2 ~~~ -4 \\ x ~~~ 9 \end{vmatrix} = 58\), find the value of x.

    • A. 10
    • B. 30
    • C. 14
    • D. 28
     

24. If \(y = 6x^3 + 2x^{-2} – x^{-3}\), find \(\frac{\mathrm d y}{\mathrm d x}\).

  • A.
    \(\frac{\mathrm d y}{\mathrm d x} = 15x^2 – 4x^{-2} – 3x^{-2}\)
  • B.
    \(\frac{\mathrm d y}{\mathrm d x} = 6x + 4x^{-1} – 3x^{-4}\)
  • C.
    \(\frac{\mathrm d y}{\mathrm d x} = 18x^2 – 4x^{-3} + 3x^{-4}\)
  • D.
    \(\frac{\mathrm d y}{\mathrm d x} = 12x^2 + 4x^{-1} – 3x^{-2}\)

25. \(\frac{d}{dx} [\log (4x^3 – 2x)]\) is equal to

  • A.
    \(\frac{12x – 2}{4x^2}\)
  • B.
    \(\frac{43x^2 – 2x}{7x}\)
  • C.
    \(\frac{4x^2 – 2}{7x + 6}\)
  • D.
    \(\frac{12x^2 – 2}{4x^3 – 2x}\)

26. If \(f(x) = 3x^3 + 4x^2 + x – 8\), what is the value of f(-2)?

  • A. -24
  • B. 30
  • C. -18
  • D. -50
27. 

Solve for x in \(\frac{4x – 6}{3} \leq \frac{3 + 2x}{2}\)

  • A. \(x \leq 1\frac{1}{2}\)
  • B. \(x \leq \frac{21}{2}\)
  • C. \(x \geq \frac{21}{2}\)
  • D. \(x \geq 1\frac{1}{2}\)
28.  Solve the inequality: -7 \(\leq\) 9 – 8x < 16 – x

  • A. -1 \(\leq\) x \(\leq\) 2
  • B. -1 \(\leq\) x < 2
  • C. -1 < x < 2
  • D. -1 < x \(\leq\) 2

29.  The nth term of a sequence is given by 2\(^{2n – 1}\). Find the sum of the first four terms.

  • A. 74
  • B. 32
  • C. 42
  • D.170

30. Integrate \(\int_{-1} ^{2} (2x^2 + x) \mathrm {d} x\)

  • A.\(4\frac{1}{2}\)
  • B.\(3\frac{1}{2}\)
  • C.\(7\frac{1}{2}\)
  • D.\(5\frac{1}{4}\)
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