POST UTME CALEB UNIVERSITY 2020 Mathematics | Objective

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Question 1 View Details
Find the volume of the solid formed by revolving the region bounded by the curves \(y = x\^2\), \(y = 0\), and \(x = 2\) about the x-axis.
Correct A. \(\frac{16\pi}{3}\)\)
B. \(\frac{32\pi}{3}\)\)
C. \(\frac{64\pi}{3}\)\)
D. \(\frac{128\pi}{3}\)\)

Correct Answer: A

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Question 2 View Details
Solve the equation \(\frac{1}{2}\)\) \log_{10} \(x^2 = 4\).
Correct A. \(10^8\)
B. \(10^4\)
C. \(10^2\)
D. \(10^6\)

Correct Answer: A

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Question 3 View Details
Find the area under the curve \(y = x\^3\) from x = -1 to \(x = 1\).
A. \(\frac{2}{3}\)\)
Correct B. \(\frac{4}{3}\)\)
C. \(\frac{6}{3}\)\)
D. \(\frac{8}{3}\)\)

Correct Answer: B

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Question 4 View Details
A matrix A has the following elements: \begin{bmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{bmatrix}. Find the determinant of A.
Correct A. 0
B. 1
C. 2
D. 3

Correct Answer: A

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Question 5 View Details
A circle has a radius of 4 cm. Find the area of the circle.
Correct A. 16\pi
B. 32\pi
C. 64\pi
D. 128\pi

Correct Answer: A

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Question 6 View Details
Find the area under the curve \(y = \frac{1}{2}x^2 + 3x - 2\) from \(x = 0\) to \(x = 4\).
A. 10
B. 12
Correct C. 14
D. 16

Correct Answer: C

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Question 7 View Details
Solve for (x) in the equation \(x^2 - 4x + 4 = 0\).
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 8 View Details
Find the sum of the first 5 terms of the geometric series \(1 + 2 + 4 + 8 + ldots\).
A. 31
Correct B. 32
C. 33
D. 34

Correct Answer: B

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Question 9 View Details
Find the equation of the circle with center (C(2, 3)) and radius 4.
Correct A. \left\(x - 2\right\)^2 + \left\(y - 3\right\)^\(2 = 16\)
B. \left\(x - 3\right\)^2 + \left\(y - 2\right\)^\(2 = 16\)
C. \left\(x - 4\right\)^2 + \left\(y - 2\right\)^\(2 = 16\)
D. \left\(x - 2\right\)^2 + \left\(y - 4\right\)^\(2 = 16\)

Correct Answer: A

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Question 10 View Details
Find the determinant of the matrix [egin{pmatrix} 1 & 2 & 3 \ 4 & 5 & 6 \ 7 & 8 & 9 \end{pmatrix}].
A. 0
B. 1
Correct C. 2
D. 3

Correct Answer: C

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Question 11 View Details
Find the value of x in the equation \(\log_{10} x^2 \\)\(= 4 ).\)
A. 10
B. 100
C. 1000
Correct D. 10000

Correct Answer: D

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Question 12 View Details
Solve the inequality \(2x^2 + 5x - 3 > 0\).
Correct A. \(-∞, -1\) ∪ (3, ∞)
B. \(-∞, -3\) ∪ (1, ∞)
C. \(-∞, 1\) ∪ (3, ∞)
D. \(-∞, -3\) ∪ (1, ∞)

Correct Answer: A

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Question 13 View Details
Find the derivative of the function ( f(x) = \(\frac{1}{x^2 + 1}\)\)\) ) using the chain rule.
Correct A. -\(\frac{2x}{x^2 + 1\) ^2}\)\)
B. \(\frac{2x}{x^2 + 1\) ^2}\)\)
C. -\(\frac{2}{x^2 + 1\) ^2}\)\)
D. \(\frac{2}{x^2 + 1\) ^2}\)\)

Correct Answer: A

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Question 14 View Details
Solve the equation \(x^2 + 4x + 4 = 0\) using the quadratic formula.
Correct A. \(-2, 0\)
B. \(-1, 1\)
C. \(-2, 2\)
D. \(-1, -1\)

Correct Answer: A

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Question 15 View Details
Find the area under the curve \(y = x^2\) from \(x = 0\) to \(x = 2\).
Correct A. \(\frac{8}{3}\)\)
B. \(\frac{16}{3}\)\)
C. \(\frac{32}{3}\)\)
D. \(\frac{64}{3}\)\)

Correct Answer: A

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Question 16 View Details
Determine the value of x in the equation \(\sin^2 x \\) + \\(\cos^2(x)\) = 1 ) if \($1x \\) = \(\frac{3}{4}\)\) ).
Correct A. \(\frac{\pi}{4}\)
B. \(\frac{3\pi}{4}\)
C. \(\frac{5\pi}{4}\)
D. \(\frac{7\pi}{4}\)

Correct Answer: A

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Question 17 View Details
Find the sum of the first 10 terms of the geometric series ( 2, 6, 18, ldots ).
Correct A. ( 2040 )
B. ( 2050 )
C. ( 2060 )
D. ( 2070 )

Correct Answer: A

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Question 18 View Details
Solve the system of equations \(egin{cases} x + 2y = 6 \ 3x - 2y = -3 \end{cases}\).
Correct A. \(x = 1, y = 2\)
B. \(x = 2, y = 1\)
C. \(x = 3, y = 2\)
D. \(x = 4, y = 3\)

Correct Answer: A

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Question 19 View Details
Find the derivative of the function ( f(x) = \(3x^2\) \sin(x) ) using the product rule.
Correct A. ( f'\((x) = 6x\)\sin(x) + \(3x^2\) \cos(x) )
B. ( f'\((x) = 6x\)\cos(x) - \(3x^2\) \sin(x) )
C. ( f'\((x) = 6x\)\sin(x) - \(3x^2\) \cos(x) )
D. ( f'\((x) = 6x\)\cos(x) + \(3x^2\) \sin(x) )

Correct Answer: A

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Question 20 View Details
Solve the inequality \(2x^2 + 5x - 3 > 0\).
Correct A. \(x < -\frac{3}{2}\) or \(x > \frac{1}{2}\)
B. \(x < -\frac{1}{2}\) or \(x > \frac{3}{2}\)
C. \(x < -\frac{1}{2}\) or \(x < \frac{3}{2}\)
D. \(x > -\frac{3}{2}\) or \(x < \frac{1}{2}\)

Correct Answer: A

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Question 21 View Details
Find the value of \(\log_{10} x^2\)\(= 4\)\).
A. 2
B. 4
C. 8
Correct D. 16

Correct Answer: D

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Question 22 View Details
Solve the equation \(\frac{1}{2}x^2 + 3x - 4 = 0\).
A. 4
Correct B. -2
C. -4
D. 2

Correct Answer: B

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Question 23 View Details
A box contains 5 red balls and 3 blue balls. If a ball is drawn at random, what is the probability that it is blue?
A. \(1/2\)
B. \(1/3\)
Correct C. \(2/5\)
D. \(3/8\)

Correct Answer: C

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Question 24 View Details
Find the value of \(\sqrt{16} + \sqrt{9}\).
A. 5
B. 7
C. 8
Correct D. 10

Correct Answer: D

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Question 25 View Details
A fair six-sided die is rolled. What is the probability that the number rolled is greater than 4?
A. \(1/2\)
B. \(1/3\)
Correct C. \(2/3\)
D. \(1/6\)

Correct Answer: C

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