Q. Determine the value of p for which the function f(x) = { x^2 + p, x < 0; 1, x = 0; 2x + p, x > 0 is continuous at x = 0.
Solution
Setting p = 1 for continuity at x = 0 gives f(0) = 1.
Correct Answer: B — 0
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Q. Determine the value of p for which the function f(x) = { x^2 - 1, x < 1; p, x = 1; 2x + 1, x > 1 is continuous at x = 1.
Solution
Setting the left limit (1 - 1 = 0) equal to the right limit (2(1) + 1 = 3), we find p = 2.
Correct Answer: C — 2
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Q. Determine the value of p for which the function f(x) = { x^3 - 3x + p, x < 1; 2x^2 + 1, x >= 1 is continuous at x = 1.
Solution
Setting 1 - 3 + p = 2 + 1 gives p = 4.
Correct Answer: A — -1
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Q. Determine the value of p for which the function f(x) = { x^3 - 3x + p, x < 1; 2x + 1, x >= 1 is continuous at x = 1.
Solution
Setting -3 + p = 3 gives p = 0.
Correct Answer: A — -1
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Q. Determine the value of \( k \) such that \( \begin{vmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & k \end{vmatrix} = 0 \).
Solution
Setting the determinant to zero and solving gives \( k = 10 \).
Correct Answer: B — 10
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Q. Determine the values of x that satisfy cos^2(x) - 1/2 = 0.
-
A.
π/4, 3π/4
-
B.
π/3, 2π/3
-
C.
π/6, 5π/6
-
D.
0, π
Solution
The solutions are x = π/4 and x = 3π/4.
Correct Answer: A — π/4, 3π/4
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Q. Determine the values of x that satisfy sin^2(x) - sin(x) = 0.
-
A.
0, π
-
B.
0, π/2, π
-
C.
0, π/2, 3π/2
-
D.
0, π/2, π, 3π/2
Solution
The solutions are x = 0, π/2, π, 3π/2.
Correct Answer: D — 0, π/2, π, 3π/2
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Q. Determine the values of x that satisfy the equation sin(2x) = 0.
-
A.
x = nπ/2
-
B.
x = nπ
-
C.
x = nπ/4
-
D.
x = nπ/3
Solution
The solutions are x = nπ/2, where n is any integer.
Correct Answer: A — x = nπ/2
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Q. Determine the values of x that satisfy the equation sin^2(x) - sin(x) = 0.
-
A.
0, π
-
B.
0, π/2, π
-
C.
0, π/2, 3π/2
-
D.
0, π/2, π, 3π/2
Solution
Factoring gives sin(x)(sin(x) - 1) = 0, so x = 0, π/2, π, 3π/2.
Correct Answer: D — 0, π/2, π, 3π/2
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Q. Determine the x-intercept of the line 4x - 2y + 8 = 0.
Solution
Setting y = 0 in the equation gives 4x + 8 = 0, thus x = -2.
Correct Answer: B — 2
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Q. Determine the x-intercept of the line 4x - 5y + 20 = 0.
Solution
Setting y = 0 in the equation gives 4x + 20 = 0, thus x = -5.
Correct Answer: D — -4
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Q. Determine the x-intercept of the line 5x + 2y - 10 = 0.
Solution
Setting y = 0 in the equation gives 5x - 10 = 0, thus x = 2.
Correct Answer: B — 5
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Q. Determine the x-intercept of the line given by the equation 2x - 3y + 6 = 0.
Solution
Set y = 0 in the equation: 2x + 6 = 0 => x = -3.
Correct Answer: B — 3
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Q. During a phase change, the temperature of a substance:
-
A.
Increases
-
B.
Decreases
-
C.
Remains constant
-
D.
Varies unpredictably
Solution
During a phase change, the temperature of a substance remains constant while the substance absorbs or releases heat.
Correct Answer: C — Remains constant
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Q. During an isochoric process, the volume of the gas:
-
A.
Increases
-
B.
Decreases
-
C.
Remains constant
-
D.
Varies with temperature
Solution
In an isochoric process, the volume of the gas remains constant.
Correct Answer: C — Remains constant
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Q. During an isochoric process, the volume of the system:
-
A.
Increases
-
B.
Decreases
-
C.
Remains constant
-
D.
Varies with temperature
Solution
In an isochoric process, the volume of the system remains constant.
Correct Answer: C — Remains constant
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Q. During an isothermal expansion of an ideal gas, what happens to the internal energy?
-
A.
Increases
-
B.
Decreases
-
C.
Remains constant
-
D.
Depends on the amount of gas
Solution
In an isothermal process for an ideal gas, the internal energy remains constant because the temperature does not change.
Correct Answer: C — Remains constant
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Q. Evaluate cos(tan^(-1)(1)).
-
A.
√2/2
-
B.
1/√2
-
C.
1
-
D.
0
Solution
Let θ = tan^(-1)(1). Then, cos(θ) = 1/√(1 + tan^2(θ)) = 1/√(1 + 1) = 1/√2.
Correct Answer: A — √2/2
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Q. Evaluate cos(tan^(-1)(3/4)).
-
A.
4/5
-
B.
3/5
-
C.
5/4
-
D.
3/4
Solution
Using the triangle with opposite = 3 and adjacent = 4, hypotenuse = 5. Thus, cos(tan^(-1)(3/4)) = 4/5.
Correct Answer: A — 4/5
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Q. Evaluate cos(tan^(-1)(5/12)).
-
A.
12/13
-
B.
5/13
-
C.
13/12
-
D.
5/12
Solution
Using the right triangle definition, cos(tan^(-1)(5/12)) = adjacent/hypotenuse = 12/13.
Correct Answer: A — 12/13
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Solution
cos^(-1)(0) = π, since cos(π) = 0.
Correct Answer: C — π
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Q. Evaluate sin(cos^(-1)(1/2)).
Solution
sin(cos^(-1)(1/2)) = √(1 - (1/2)^2) = √(3/4) = √3/2.
Correct Answer: A — √3/2
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Q. Evaluate sin(tan^(-1)(3/4)).
-
A.
3/5
-
B.
4/5
-
C.
1/5
-
D.
5/5
Solution
Using the right triangle definition, sin(tan^(-1)(3/4)) = opposite/hypotenuse = 3/5.
Correct Answer: A — 3/5
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Q. Evaluate sin(tan^(-1)(x)).
-
A.
x/√(1+x^2)
-
B.
√(1-x^2)
-
C.
1/x
-
D.
x
Solution
Using the identity, sin(tan^(-1)(x)) = x/√(1+x^2).
Correct Answer: A — x/√(1+x^2)
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Q. Evaluate sin^(-1)(-1/2) + cos^(-1)(1/2).
Solution
sin^(-1)(-1/2) = -π/6 and cos^(-1)(1/2) = π/3. Therefore, -π/6 + π/3 = π/6.
Correct Answer: B — π/2
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Q. Evaluate sin^(-1)(sin(5π/6)).
-
A.
5π/6
-
B.
π/6
-
C.
7π/6
-
D.
0
Solution
Since 5π/6 is in the range of sin^(-1), sin^(-1)(sin(5π/6)) = 5π/6.
Correct Answer: A — 5π/6
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Q. Evaluate sin^(-1)(sin(π/3)).
-
A.
π/3
-
B.
2π/3
-
C.
π/6
-
D.
0
Solution
sin^(-1)(sin(π/3)) = π/3, since π/3 is in the range of sin^(-1).
Correct Answer: A — π/3
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Q. Evaluate sin^(-1)(sin(π/4)).
-
A.
π/4
-
B.
3π/4
-
C.
π/2
-
D.
0
Solution
sin^(-1)(sin(π/4)) = π/4
Correct Answer: A — π/4
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Q. Evaluate sin^(-1)(√3/2) + cos^(-1)(1/2).
-
A.
π/3
-
B.
π/2
-
C.
π/4
-
D.
2π/3
Solution
sin^(-1)(√3/2) + cos^(-1)(1/2) = π/2
Correct Answer: B — π/2
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Q. Evaluate tan(sin^(-1)(1/√2)).
Solution
If sin(x) = 1/√2, then x = π/4, thus tan(sin^(-1)(1/√2)) = tan(π/4) = 1.
Correct Answer: A — 1
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