Q. If E = [[2, 1, 3], [1, 0, 2], [4, 1, 1]], what is det(E)? (2020)
Solution
The determinant of E can be calculated using the rule of Sarrus or cofactor expansion, resulting in 0.
Correct Answer: A — -1
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Q. If E = [[a, b], [c, d]], what is the expression for det(E)? (2023)
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A.
ad - bc
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B.
ab + cd
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C.
ac - bd
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D.
bc - ad
Solution
The determinant of E is calculated as (a*d) - (b*c) = ad - bc.
Correct Answer: A — ad - bc
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Q. If F = [[1, 2, 3], [0, 1, 4], [5, 6, 0]], what is det(F)? (2021)
Solution
Det(F) = 1(1*0 - 4*6) - 2(0*0 - 4*5) + 3(0*6 - 1*5) = 1(0 - 24) - 2(0 - 20) + 3(0 - 5) = -24 + 40 - 15 = 1.
Correct Answer: A — -14
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Q. If F = [[2, 0], [0, 3]], what is det(F)? (2020)
Solution
The determinant of F is calculated as (2*3) - (0*0) = 6.
Correct Answer: B — 6
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Q. If F = [[2, 1, 3], [1, 0, 2], [0, 1, 1]], what is det(F)? (2023)
Solution
Det(F) = 2(0*1 - 2*1) - 1(1*1 - 2*0) + 3(1*1 - 0*0) = 2(0 - 2) - 1(1) + 3(1) = -4 - 1 + 3 = -2.
Correct Answer: C — 3
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Q. If F = [[2, 1, 3], [1, 0, 2], [3, 1, 1]], find det(F). (2022)
Solution
Using the determinant formula, det(F) = 2(0*1 - 2*1) - 1(1*1 - 2*3) + 3(1*1 - 0*3) = 2(0 - 2) - 1(1 - 6) + 3(1 - 0) = -4 + 5 + 3 = 4.
Correct Answer: A — -4
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Q. If F = [[2, 1, 3], [1, 0, 2], [3, 4, 1]], find det(F). (2022)
Solution
Using the determinant formula, det(F) = 2*(0*1 - 2*4) - 1*(1*1 - 2*3) + 3*(1*4 - 0*3) = 2*(-8) - 1*(-5) + 3*4 = -16 + 5 + 12 = 1.
Correct Answer: A — -10
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Q. If F = [[2, 1], [1, 3]], what is the value of det(F)? (2022)
Solution
The determinant of F is (2*3) - (1*1) = 6 - 1 = 5.
Correct Answer: A — 5
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Q. If f(x) = x^3 - 3x^2 + 4, find the critical points. (2022)
-
A.
1, 2
-
B.
0, 3
-
C.
2, 4
-
D.
1, 3
Solution
f'(x) = 3x^2 - 6x. Setting f'(x) = 0 gives x(3x - 6) = 0, so x = 0 or x = 2.
Correct Answer: A — 1, 2
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Q. If G = [[1, 1], [1, -1]], find det(G). (2022)
Solution
Determinant of G = (1*-1) - (1*1) = -1 - 1 = -2.
Correct Answer: B — 1
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Q. If H = [[1, 1], [1, -1]], find det(H). (2016)
Solution
Det(H) = (1*-1) - (1*1) = -1 - 1 = -2.
Correct Answer: B — 1
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Q. If H = [[1, 2, 1], [0, 1, 0], [2, 1, 1]], find det(H). (2021)
Solution
The determinant of H is calculated as 1(1*1 - 0*1) - 2(0*1 - 0*2) + 1(0*1 - 1*2) = 1 - 0 - 2 = -1.
Correct Answer: B — 1
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Q. If H = [[1, 2], [2, 4]], what is det(H)? (2020)
Solution
The determinant of H is (1*4) - (2*2) = 4 - 4 = 0.
Correct Answer: A — 0
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Q. If H = [[2, 3], [4, 5]], find det(H). (2022)
Solution
Det(H) = (2*5) - (3*4) = 10 - 12 = -2.
Correct Answer: D — 7
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Q. If H = [[2, 3], [4, 5]], what is det(H)? (2022)
Solution
Det(H) = (2*5) - (3*4) = 10 - 12 = -2.
Correct Answer: A — -2
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Q. If I = [[1, 0, 2], [0, 1, 3], [1, 0, 4]], find det(I). (2021)
Solution
Using cofactor expansion, det(I) = 1(1*4 - 3*0) - 0 + 2(0*0 - 1*1) = 4 - 2 = 2.
Correct Answer: B — 2
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Q. If I = [[1, 0, 2], [0, 1, 3], [1, 1, 0]], find det(I). (2023)
Solution
Using the determinant formula for 3x3 matrices, det(I) = 1(1*0 - 3*1) - 0(0 - 3*1) + 2(0 - 1*1) = 0 - 0 - 2 = -2.
Correct Answer: A — -1
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Q. If I = [[1, 2], [2, 4]], what is det(I)? (2021)
Solution
The determinant of I is 0 because the rows are linearly dependent.
Correct Answer: A — 0
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Q. If J = [[1, 1], [1, 1]], what is det(J)? (2019)
Solution
Det(J) = (1*1) - (1*1) = 1 - 1 = 0.
Correct Answer: A — 0
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Q. If J = [[1, 2, 1], [0, 1, 0], [2, 1, 1]], find det(J). (2019)
Solution
Determinant of J = 1(1*1 - 0*1) - 2(0*1 - 0*2) + 1(0*1 - 1*2) = 1 - 0 - 2 = -1.
Correct Answer: C — 2
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Q. If J = [[1, 2, 1], [0, 1, 3], [2, 1, 0]], calculate det(J). (2023)
Solution
Using the determinant formula, det(J) = 1*(1*0 - 3*1) - 2*(0*0 - 3*2) + 1*(0*1 - 1*2) = 1*(-3) - 2*(-6) + 1*(-2) = -3 + 12 - 2 = 7.
Correct Answer: A — -4
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Q. If J = [[1, 2], [2, 4]], what is det(J)? (2022)
Solution
Det(J) = (1*4) - (2*2) = 4 - 4 = 0.
Correct Answer: A — 0
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Q. If one root of the equation x² - 6x + k = 0 is 2, find k. (2022)
Solution
Using the root 2 in the equation: 2² - 6*2 + k = 0, we find k = 10.
Correct Answer: B — 10
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Q. If one root of the equation x² - 7x + k = 0 is 3, find k. (2023)
Solution
Using the root, substitute x = 3: 3² - 7*3 + k = 0, which gives k = 10.
Correct Answer: A — 10
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Q. If one root of the equation x² - 7x + k = 0 is 3, what is the value of k? (2020)
Solution
Using the root, substitute x = 3: 3² - 7*3 + k = 0, which gives k = 9.
Correct Answer: D — 9
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Q. If one root of the equation x² - 7x + p = 0 is 3, what is the value of p? (2020)
Solution
Using the root, substitute x = 3: 3² - 7*3 + p = 0, which gives p = 6.
Correct Answer: B — 9
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Q. If sin(θ) = 0.5, what is θ in degrees? (2014)
-
A.
30°
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B.
45°
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C.
60°
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D.
90°
Solution
sin(30°) = 0.5, so θ = 30°.
Correct Answer: A — 30°
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Q. If sin(θ) = 0.6, what is the approximate value of θ in degrees? (2019)
-
A.
36.87°
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B.
45°
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C.
53.13°
-
D.
60°
Solution
Using inverse sine, θ ≈ 36.87°
Correct Answer: C — 53.13°
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Q. If sin(θ) = 0.8, what is cos(θ) using Pythagorean identity? (2020)
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A.
0.6
-
B.
0.8
-
C.
0.4
-
D.
0.2
Solution
Using sin²(θ) + cos²(θ) = 1, cos²(θ) = 1 - 0.64 = 0.36, cos(θ) = 0.6
Correct Answer: A — 0.6
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Q. If sin(θ) = 0.8, what is cos(θ)? (2022)
-
A.
0.6
-
B.
0.8
-
C.
0.4
-
D.
0.2
Solution
Using sin²(θ) + cos²(θ) = 1, cos(θ) = √(1 - 0.8²) = √(0.36) = 0.6.
Correct Answer: A — 0.6
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