# 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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