Q. Determine the continuity of the function f(x) = { x^2, x < 1; 2x - 1, x >= 1 } at x = 1.
-
A.
Continuous
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B.
Not continuous
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C.
Depends on the limit
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D.
Only left continuous
Solution
The left limit as x approaches 1 is 1, and the right limit is also 1. Thus, f(1) = 1, making it continuous.
Correct Answer: A — Continuous
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Q. Determine the coordinates of the centroid of the triangle with vertices at (0, 0), (6, 0), and (3, 6).
-
A.
(3, 2)
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B.
(3, 3)
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C.
(2, 3)
-
D.
(0, 0)
Solution
Centroid = ((0+6+3)/3, (0+0+6)/3) = (3, 2).
Correct Answer: B — (3, 3)
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Q. Determine the critical points of f(x) = x^3 - 3x + 2.
-
A.
-1, 1
-
B.
0, 2
-
C.
1, -2
-
D.
2, -1
Solution
Setting f'(x) = 3x^2 - 3 = 0 gives x^2 = 1, so critical points are x = -1 and x = 1.
Correct Answer: A — -1, 1
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Q. Determine the critical points of f(x) = x^3 - 3x^2 + 4.
-
A.
(0, 4)
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B.
(1, 2)
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C.
(2, 1)
-
D.
(3, 0)
Solution
f'(x) = 3x^2 - 6x. Setting f'(x) = 0 gives x = 0 and x = 2. Critical points are (0, 4) and (2, 1).
Correct Answer: B — (1, 2)
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Q. Determine the critical points of f(x) = x^3 - 6x^2 + 9x.
-
A.
x = 0, 3
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B.
x = 1, 2
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C.
x = 2, 3
-
D.
x = 1, 3
Solution
Setting f'(x) = 0 gives critical points at x = 0 and x = 3.
Correct Answer: A — x = 0, 3
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Q. Determine the critical points of f(x) = x^4 - 4x^3 + 6.
-
A.
x = 0, 3
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B.
x = 1, 2
-
C.
x = 2, 3
-
D.
x = 1, 3
Solution
Setting f'(x) = 0 gives critical points at x = 1 and x = 2.
Correct Answer: B — x = 1, 2
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Q. Determine the critical points of f(x) = x^4 - 8x^2 + 16.
-
A.
x = 0, ±2
-
B.
x = ±4
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C.
x = ±1
-
D.
x = 2
Solution
Setting f'(x) = 0 gives critical points at x = 0, ±2.
Correct Answer: A — x = 0, ±2
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Q. Determine the critical points of f(x) = x^4 - 8x^2.
-
A.
x = 0, ±2
-
B.
x = ±4
-
C.
x = ±1
-
D.
x = 2
Solution
f'(x) = 4x^3 - 16x = 4x(x^2 - 4). Critical points are x = 0, ±2.
Correct Answer: A — x = 0, ±2
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Q. Determine the critical points of the function f(x) = x^3 - 6x^2 + 9x.
-
A.
(0, 0)
-
B.
(1, 4)
-
C.
(2, 0)
-
D.
(3, 0)
Solution
f'(x) = 3x^2 - 12x + 9. Setting f'(x) = 0 gives (x - 1)(x - 3) = 0, so critical points are x = 1 and x = 3.
Correct Answer: D — (3, 0)
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Q. Determine the derivative of f(x) = 1/x.
-
A.
-1/x^2
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B.
1/x^2
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C.
1/x
-
D.
-1/x
Solution
Using the power rule, f'(x) = -1/x^2.
Correct Answer: A — -1/x^2
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Q. Determine the derivative of f(x) = ln(x^2 + 1).
-
A.
2x/(x^2 + 1)
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B.
1/(x^2 + 1)
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C.
2/(x^2 + 1)
-
D.
x/(x^2 + 1)
Solution
Using the chain rule, f'(x) = (1/(x^2 + 1)) * (2x) = 2x/(x^2 + 1).
Correct Answer: A — 2x/(x^2 + 1)
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Q. Determine the derivative of f(x) = x^2 * e^x.
-
A.
e^x * (x^2 + 2x)
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B.
e^x * (2x + 1)
-
C.
2x * e^x
-
D.
x^2 * e^x
Solution
Using the product rule, f'(x) = d/dx(x^2 * e^x) = e^x * (x^2 + 2x).
Correct Answer: A — e^x * (x^2 + 2x)
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Q. Determine the equation of the circle with center (2, -3) and radius 5.
-
A.
(x - 2)² + (y + 3)² = 25
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B.
(x + 2)² + (y - 3)² = 25
-
C.
(x - 2)² + (y - 3)² = 25
-
D.
(x + 2)² + (y + 3)² = 25
Solution
Equation of circle: (x - h)² + (y - k)² = r² => (x - 2)² + (y + 3)² = 5² = 25.
Correct Answer: A — (x - 2)² + (y + 3)² = 25
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Q. Determine the equation of the line that passes through the points (0, 0) and (3, 9).
-
A.
y = 3x
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B.
y = 2x
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C.
y = 3x + 1
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D.
y = x + 1
Solution
The slope m = (9 - 0) / (3 - 0) = 3. The equation is y = 3x.
Correct Answer: A — y = 3x
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Q. Determine the equation of the tangent line to the curve y = x^2 + 2x at the point where x = 1.
-
A.
y = 3x - 2
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B.
y = 2x + 1
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C.
y = 2x + 3
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D.
y = x + 3
Solution
f'(x) = 2x + 2. At x = 1, f'(1) = 4. The point is (1, 4). The tangent line is y - 4 = 4(x - 1) => y = 4x - 4 + 4 => y = 4x - 2.
Correct Answer: A — y = 3x - 2
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Q. Determine the family of curves represented by the equation x^2 - y^2 = c, where c is a constant.
-
A.
Circles
-
B.
Ellipses
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C.
Hyperbolas
-
D.
Parabolas
Solution
The equation x^2 - y^2 = c represents a family of hyperbolas with varying values of c.
Correct Answer: C — Hyperbolas
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Q. Determine the family of curves represented by the equation x^2/a^2 + y^2/b^2 = 1.
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A.
Circles
-
B.
Ellipses with varying axes
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C.
Hyperbolas
-
D.
Parabolas
Solution
The equation x^2/a^2 + y^2/b^2 = 1 represents a family of ellipses with varying semi-major and semi-minor axes.
Correct Answer: B — Ellipses with varying axes
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Q. Determine the family of curves represented by the equation y = ax^2 + bx + c.
-
A.
Parabolas
-
B.
Circles
-
C.
Ellipses
-
D.
Straight lines
Solution
The equation y = ax^2 + bx + c represents a family of parabolas with varying coefficients a, b, and c.
Correct Answer: A — Parabolas
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Q. Determine the family of curves represented by the equation y = ax^3 + bx.
-
A.
Cubic functions
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B.
Quadratic functions
-
C.
Linear functions
-
D.
Exponential functions
Solution
The equation y = ax^3 + bx represents a family of cubic functions where a and b are constants.
Correct Answer: A — Cubic functions
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Q. Determine the family of curves represented by the equation y = ax^3 + bx^2 + cx + d.
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A.
Cubic functions
-
B.
Quadratic functions
-
C.
Linear functions
-
D.
Exponential functions
Solution
The equation y = ax^3 + bx^2 + cx + d represents a family of cubic functions.
Correct Answer: A — Cubic functions
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Q. Determine the family of curves represented by the equation y = e^(kx) for varying k.
-
A.
Exponential curves
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B.
Linear functions
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C.
Quadratic functions
-
D.
Logarithmic functions
Solution
The equation y = e^(kx) represents a family of exponential curves with varying growth rates determined by k.
Correct Answer: A — Exponential curves
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Q. Determine the family of curves represented by the equation y = k/x, where k is a constant.
-
A.
Hyperbolas
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B.
Circles
-
C.
Ellipses
-
D.
Parabolas
Solution
The equation y = k/x represents a family of hyperbolas with varying values of 'k'.
Correct Answer: A — Hyperbolas
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Q. Determine the family of curves represented by the equation y = kx^2, where k is a constant.
-
A.
Circles
-
B.
Ellipses
-
C.
Parabolas
-
D.
Hyperbolas
Solution
The equation y = kx^2 represents a family of parabolas that open upwards or downwards depending on the sign of k.
Correct Answer: C — Parabolas
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Q. Determine the focus of the parabola defined by the equation x^2 = 12y.
-
A.
(0, 3)
-
B.
(0, -3)
-
C.
(3, 0)
-
D.
(-3, 0)
Solution
The equation x^2 = 4py gives 4p = 12, hence p = 3. The focus is at (0, p) = (0, 3).
Correct Answer: A — (0, 3)
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Q. Determine the focus of the parabola given by the equation x^2 = 8y.
-
A.
(0, 2)
-
B.
(0, 4)
-
C.
(2, 0)
-
D.
(4, 0)
Solution
The standard form of the parabola is x^2 = 4py. Here, 4p = 8, so p = 2. The focus is at (0, p) = (0, 2).
Correct Answer: B — (0, 4)
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Q. Determine the hybridization of the central atom in BF3.
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
Boron in BF3 is sp2 hybridized, forming three equivalent sp2 hybrid orbitals.
Correct Answer: B — sp2
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Q. Determine the hybridization of the central atom in O3.
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
The central atom in ozone (O3) is sp2 hybridized, forming a resonance structure.
Correct Answer: B — sp2
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Q. Determine the hybridization of the central atom in PCl5.
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
Phosphorus in PCl5 is dsp3 hybridized, allowing it to form five bonds.
Correct Answer: D — dsp3
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Q. Determine the intervals where the function f(x) = x^3 - 3x is increasing.
-
A.
(-∞, -1)
-
B.
(-1, 1)
-
C.
(1, ∞)
-
D.
(-∞, 1)
Solution
f'(x) = 3x^2 - 3. Setting f'(x) = 0 gives x = ±1. f'(x) > 0 for x > 1, so f(x) is increasing on (1, ∞).
Correct Answer: C — (1, ∞)
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Q. Determine the intervals where the function f(x) = x^4 - 4x^3 has increasing behavior.
-
A.
(-∞, 0) U (2, ∞)
-
B.
(0, 2)
-
C.
(0, ∞)
-
D.
(2, ∞)
Solution
f'(x) = 4x^3 - 12x^2 = 4x^2(x - 3). The function is increasing where f'(x) > 0, which is in the intervals (-∞, 0) and (3, ∞).
Correct Answer: A — (-∞, 0) U (2, ∞)
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