Q. Find the integral of e^(2x) dx.
A.
(1/2)e^(2x) + C
B.
2e^(2x) + C
C.
e^(2x) + C
D.
(1/2)e^(x) + C
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Solution
The integral of e^(2x) is (1/2)e^(2x) + C, where C is the constant of integration.
Correct Answer:
A
— (1/2)e^(2x) + C
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Q. Find the integral of x^2 with respect to x.
A.
(1/3)x^3 + C
B.
(1/2)x^3 + C
C.
(1/4)x^4 + C
D.
x^3 + C
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Solution
The integral of x^2 is (1/3)x^3 + C, where C is the constant of integration.
Correct Answer:
A
— (1/3)x^3 + C
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Q. Find the inverse of the matrix D = [[4, 7], [2, 6]]. (2023)
A.
[[3/2, -7/4], [-1/2, 2/4]]
B.
[[3/2, -7/4], [-1/4, 2/4]]
C.
[[6, -7], [-2, 4]]
D.
[[6, 7], [2, 4]]
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Solution
The inverse of D is (1/det(D)) * adj(D) = (1/(4*6 - 7*2)) * [[6, -7], [-2, 4]] = [[3/2, -7/4], [-1/2, 2/4]].
Correct Answer:
A
— [[3/2, -7/4], [-1/2, 2/4]]
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Q. Find the inverse of the matrix F = [[4, 7], [2, 6]]. (2021)
A.
[[3, -7], [-1, 4]]
B.
[[6, -7], [-2, 4]]
C.
[[3, 7], [-1, 2]]
D.
[[2, -7], [-1, 4]]
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Solution
The inverse of F is given by (1/det(F)) * adj(F). Here, det(F) = 4*6 - 7*2 = 10, and adj(F) = [[6, -7], [-2, 4]]. Thus, F^(-1) = (1/10) * [[6, -7], [-2, 4]] = [[3/5, -7/10], [-1/5, 2/5]].
Correct Answer:
A
— [[3, -7], [-1, 4]]
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Q. Find the limit: lim (x -> 0) (x^3)/(sin(x)) (2023)
A.
0
B.
1
C.
Infinity
D.
Undefined
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Solution
Using the fact that sin(x) approaches x as x approaches 0, we have lim (x -> 0) (x^3)/(sin(x)) = 0.
Correct Answer:
A
— 0
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Q. Find the limit: lim (x -> ∞) (3x^2 + 2)/(5x^2 - 4x + 1)
A.
3/5
B.
0
C.
1
D.
Infinity
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Solution
As x approaches infinity, the leading terms dominate. Thus, lim (x -> ∞) (3x^2)/(5x^2) = 3/5.
Correct Answer:
A
— 3/5
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Q. Find the local maxima of f(x) = -x^2 + 6x - 8. (2022)
A.
(3, 1)
B.
(2, 2)
C.
(4, 0)
D.
(1, 5)
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Solution
f'(x) = -2x + 6; setting to 0 gives x = 3; f(3) = -3^2 + 6(3) - 8 = 1.
Correct Answer:
A
— (3, 1)
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Q. Find the local minima of f(x) = x^2 - 4x + 5.
A.
(2, 1)
B.
(1, 2)
C.
(0, 5)
D.
(4, 0)
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Solution
The vertex occurs at x = 2. f(2) = 2^2 - 4*2 + 5 = 1, so local minima is (2, 1).
Correct Answer:
A
— (2, 1)
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Q. Find the maximum value of f(x) = -2x^2 + 10x - 12. (2023)
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Solution
The maximum occurs at x = -b/(2a) = 10/(2*2) = 2.5. f(2.5) = -2(2.5^2) + 10(2.5) - 12 = 6.
Correct Answer:
D
— 8
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Q. Find the maximum value of f(x) = -3x^2 + 12x - 5. (2020)
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Solution
The maximum occurs at x = -b/(2a) = -12/(-6) = 2. f(2) = -3(2^2) + 12(2) - 5 = 7.
Correct Answer:
C
— 7
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Q. Find the maximum value of f(x) = -x^2 + 4x + 5. (2021)
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Solution
The vertex is at x = -4/(2*(-1)) = 2. The maximum value is f(2) = -2^2 + 4*2 + 5 = 7.
Correct Answer:
C
— 7
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Q. Find the median of the data set: 12, 15, 11, 10, 14, 13. (2020)
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Solution
First, arrange the numbers: 10, 11, 12, 13, 14, 15. Since there are 6 numbers (even), the median is the average of the 3rd and 4th numbers: (12 + 13) / 2 = 12.5.
Correct Answer:
C
— 13
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Q. Find the median of the data set: 12, 15, 11, 14, 13, 10. (2020)
Show solution
Solution
First, arrange the numbers: 10, 11, 12, 13, 14, 15. Since there are 6 numbers (even), the median is the average of the 3rd and 4th numbers: (12 + 13) / 2 = 12.5.
Correct Answer:
C
— 13
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Q. Find the median of the following data set: 12, 15, 11, 14, 13, 10. (2019)
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Solution
First, arrange the numbers: 10, 11, 12, 13, 14, 15. The median is the average of the 3rd and 4th numbers: (12 + 13) / 2 = 12.5.
Correct Answer:
B
— 13
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Q. Find the median of the following set of numbers: 10, 20, 30, 40, 50, 60, 70, 80.
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Solution
Arrange the numbers: 10, 20, 30, 40, 50, 60, 70, 80. The median is the average of the 4th and 5th values: (40 + 50) / 2 = 45.
Correct Answer:
B
— 40
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Q. Find the median of the following set of numbers: 9, 3, 6, 2, 8. (2023)
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Solution
Arrange the numbers: 2, 3, 6, 8, 9. The median is the middle number, which is 6.
Correct Answer:
A
— 6
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Q. Find the median of the numbers: 12, 15, 10, 20, 18, 25.
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Solution
Arrange the numbers: 10, 12, 15, 18, 20, 25. Since there are 6 numbers, the median is the average of the 3rd and 4th values: (15 + 18) / 2 = 16.5.
Correct Answer:
B
— 18
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Q. Find the minimum value of f(x) = 4x^2 - 16x + 15. (2023)
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Solution
The minimum occurs at x = -b/(2a) = 16/(2*4) = 2. f(2) = 4(2^2) - 16(2) + 15 = 1.
Correct Answer:
A
— 1
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Q. Find the minimum value of f(x) = 4x^2 - 8x + 3. (2022)
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Solution
The vertex is at x = 8/(2*4) = 1. The minimum value is f(1) = 4(1)^2 - 8(1) + 3 = -1.
Correct Answer:
B
— 1
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Q. Find the minimum value of f(x) = x^2 + 6x + 10. (2020)
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Solution
The minimum occurs at x = -b/(2a) = -6/(2*1) = -3. f(-3) = (-3)^2 + 6(-3) + 10 = 1.
Correct Answer:
A
— 2
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Q. Find the minimum value of the function f(x) = 3x^2 - 12x + 9. (2022)
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Solution
The minimum occurs at x = -b/(2a) = 12/(2*3) = 2. f(2) = 3(2^2) - 12(2) + 9 = 3.
Correct Answer:
C
— 3
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Q. Find the mode of the following set of numbers: 1, 2, 2, 3, 4, 4, 4, 5, 5.
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Solution
The mode is 4, as it appears 3 times, which is more than any other number.
Correct Answer:
C
— 4
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Q. Find the mode of the following set of numbers: 10, 12, 10, 15, 10, 20, 15, 15.
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Solution
The number 10 appears 3 times and 15 appears 3 times. Since both have the highest frequency, the mode is 10 and 15 (bimodal). However, if only one mode is required, we can take the first one, which is 10.
Correct Answer:
C
— 15
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Q. Find the mode of the following set of numbers: 10, 12, 10, 15, 10, 20, 15.
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Solution
The mode is 10, as it appears most frequently (three times) in the data set.
Correct Answer:
A
— 10
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Q. Find the mode of the following set of numbers: 10, 20, 20, 30, 30, 30, 40, 50.
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Solution
The mode is 30, as it appears 3 times, more than any other number.
Correct Answer:
C
— 30
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Q. Find the mode of the following set of numbers: 12, 15, 12, 18, 20, 15, 15, 22.
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Solution
The mode is 15, which appears 3 times in the data set.
Correct Answer:
B
— 15
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Q. Find the mode of the following set of numbers: 12, 15, 12, 18, 20, 15, 15.
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Solution
The number 15 appears most frequently (three times), making it the mode.
Correct Answer:
B
— 15
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Q. Find the mode of the following set of numbers: 4, 1, 2, 4, 3, 4, 5, 1.
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Solution
The mode is 4, as it appears four times, which is more than any other number.
Correct Answer:
D
— 4
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Q. Find the mode of the following set of numbers: 7, 8, 9, 9, 10, 10, 10, 11.
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Solution
The mode is 10, as it appears 3 times, which is more than any other number.
Correct Answer:
D
— 10
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Q. Find the mode of the following set of numbers: {10, 12, 10, 15, 10, 20, 15, 15, 25}.
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Solution
The number 10 appears 3 times and 15 appears 3 times. Both are modes, but since we need to choose one, we can say the mode is 10.
Correct Answer:
B
— 15
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