Q. If the eccentricity of a parabola is e, what is the value of e?
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Solution
The eccentricity of a parabola is always equal to 1.
Correct Answer: B — 1
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Q. If the equation 2x^2 + 3x + k = 0 has one root equal to 1, what is the value of k?
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Solution
Substituting x = 1 gives 2(1)^2 + 3(1) + k = 0 => 2 + 3 + k = 0 => k = -5.
Correct Answer: A — -1
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Q. If the equation 2x^2 + 3x + k = 0 has roots 1 and -2, what is the value of k?
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Solution
Using Vieta's formulas, k = 2*1*(-2) = -4.
Correct Answer: D — 4
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Q. If the equation 2x^2 + 3x - 5 = 0 has roots r1 and r2, what is the value of r1 + r2?
A.
-3/2
B.
3/2
C.
5/2
D.
-5/2
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Solution
Using Vieta's formulas, r1 + r2 = -b/a = -3/2.
Correct Answer: A — -3/2
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Q. If the equation of a parabola is given by y^2 = 12x, what is the value of 'p'?
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Solution
In the equation y^2 = 4px, p = 3, hence the value of 'p' is 3.
Correct Answer: B — 6
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Q. If the equation of an ellipse is 9x^2 + 16y^2 = 144, what are the lengths of the semi-major and semi-minor axes?
A.
3, 4
B.
4, 3
C.
6, 8
D.
8, 6
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Solution
Rewriting the equation in standard form gives (x^2/16) + (y^2/9) = 1, so semi-major axis a = 4 and semi-minor axis b = 3.
Correct Answer: A — 3, 4
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Q. If the equation x^2 + px + q = 0 has roots 2 and 3, what is the value of p?
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Solution
Using Vieta's formulas, p = -(2 + 3) = -5.
Correct Answer: A — -5
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Q. If the expansion of (x + a)^n has a term 15x^3a^2, what is the value of n?
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Solution
The term is given by C(n, 3) * a^2 * x^3. Setting C(n, 3) * a^2 = 15 gives n = 6.
Correct Answer: B — 6
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Q. If the family of curves is given by y = k/x, what type of curves does it represent?
A.
Linear
B.
Hyperbolic
C.
Circular
D.
Exponential
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Solution
The equation y = k/x represents a family of hyperbolas.
Correct Answer: B — Hyperbolic
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Q. If the first term of an arithmetic series is 5 and the common difference is 3, what is the 15th term?
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Solution
a_n = a + (n-1)d = 5 + (15-1) * 3 = 5 + 42 = 47.
Correct Answer: A — 44
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Q. If the following numbers are arranged in ascending order: 3, 7, 8, 12, 14, what is the range?
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Solution
Range = Maximum - Minimum = 14 - 3 = 11
Correct Answer: A — 11
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Q. If the function f(x) = e^x + x^2 has a minimum at x = 0, then f(0) is:
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Solution
Evaluating f(0) = e^0 + 0^2 = 1 + 0 = 1.
Correct Answer: A — 1
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Q. If the height of an isosceles triangle is 12 cm and the base is 10 cm, what is the area of the triangle?
A.
60 cm²
B.
70 cm²
C.
80 cm²
D.
90 cm²
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Solution
The area of a triangle is given by (1/2) * base * height = (1/2) * 10 * 12 = 60 cm².
Correct Answer: A — 60 cm²
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Q. If the lengths of the semi-major and semi-minor axes of an ellipse are 5 and 3 respectively, what is the distance between the foci?
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Solution
The distance between the foci is given by 2c, where c = √(a^2 - b^2). Here, c = √(5^2 - 3^2) = √16 = 4, so the distance is 2c = 8.
Correct Answer: A — 4
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Q. If the line 3x + 4y = 12 intersects the x-axis, what is the point of intersection?
A.
(4, 0)
B.
(0, 3)
C.
(0, 4)
D.
(3, 0)
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Solution
Set y = 0 in the equation: 3x = 12 => x = 4. The point is (4, 0).
Correct Answer: A — (4, 0)
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Q. If the line 3x + 4y = 12 intersects the x-axis, what is the x-coordinate of the intersection point?
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Solution
Set y = 0 in the equation: 3x = 12 => x = 4.
Correct Answer: A — 4
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Q. If the line 3x + 4y = 12 is transformed to slope-intercept form, what is the slope?
A.
-3/4
B.
3/4
C.
4/3
D.
-4/3
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Solution
Rearranging gives y = -3/4x + 3. The slope is -3/4.
Correct Answer: A — -3/4
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Q. If the line 3x + 4y = 12 is transformed to slope-intercept form, what is the y-intercept?
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Solution
Rearranging gives y = -3/4x + 3. The y-intercept is 3.
Correct Answer: B — 4
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Q. If the line 3x - 4y + 12 = 0 is parallel to another line, what is the slope of that line?
A.
3/4
B.
-3/4
C.
4/3
D.
-4/3
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Solution
The slope of the line is given by -A/B = -3/-4 = 3/4. Parallel lines have the same slope.
Correct Answer: B — -3/4
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Q. If the line 3x - 4y + 12 = 0 is transformed to slope-intercept form, what is the slope?
A.
3/4
B.
-3/4
C.
4/3
D.
-4/3
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Solution
Rearranging gives y = (3/4)x + 3, so the slope is -3/4.
Correct Answer: B — -3/4
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Q. If the line 5x + 12y = 60 is transformed to slope-intercept form, what is the slope?
A.
-5/12
B.
5/12
C.
12/5
D.
-12/5
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Solution
Rearranging gives y = -5/12 x + 5, so the slope is -5/12.
Correct Answer: A — -5/12
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Q. If the line 5x + 2y = 10 intersects the y-axis, what is the y-coordinate of the intersection point?
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Solution
Setting x = 0 in the equation gives 2y = 10, hence y = 5.
Correct Answer: B — 2
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Q. If the line 5x - 2y + 10 = 0 is reflected about the x-axis, what is the new equation?
A.
5x + 2y + 10 = 0
B.
5x - 2y - 10 = 0
C.
5x + 2y - 10 = 0
D.
5x - 2y + 10 = 0
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Solution
Reflecting about the x-axis changes the sign of y-coefficient: 5x + 2y + 10 = 0.
Correct Answer: A — 5x + 2y + 10 = 0
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Q. If the line y = mx + 1 is perpendicular to the line 2x + 3y = 6, what is the value of m?
A.
-3/2
B.
2/3
C.
3/2
D.
-2/3
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Solution
Slope of 2x + 3y = 6 is -2/3, so m = 3/2 (negative reciprocal).
Correct Answer: A — -3/2
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Q. If the lines represented by the equation 2x^2 + 3xy + y^2 = 0 are intersecting, what is the condition on the coefficients?
A.
D > 0
B.
D = 0
C.
D < 0
D.
D = 1
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Solution
The lines intersect if the discriminant D = b^2 - 4ac > 0.
Correct Answer: A — D > 0
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Q. If the lines represented by the equation 2x^2 + 3xy + y^2 = 0 intersect at the origin, what is the sum of the slopes?
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Solution
The sum of the slopes of the lines can be found using the relation -b/a, which gives -3.
Correct Answer: A — -3
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Q. If the lines represented by the equation 3x^2 + 2xy - y^2 = 0 intersect at an angle of 60 degrees, what is the value of the coefficient of xy?
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Solution
Using the formula for the angle between two lines, we can derive the coefficient of xy that satisfies the angle condition.
Correct Answer: A — 2
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Q. If the lines represented by the equation 3x^2 + 2xy - y^2 = 0 intersect at the origin, what is the product of their slopes?
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Solution
The product of the slopes of the lines can be found from the equation. Here, the product of the slopes is given by -c/a, where c is the coefficient of xy and a is the coefficient of x^2.
Correct Answer: A — -1
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Q. If the lines represented by the equation 3x^2 + 4xy + 2y^2 = 0 are perpendicular, what is the value of k?
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Solution
For the lines to be perpendicular, the condition 4 - 4(3)(2) = 0 must hold, leading to k = 0.
Correct Answer: A — -1
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Q. If the lines represented by the equation 3x^2 + 4xy + 2y^2 = 0 intersect at the origin, what is the product of their slopes?
A.
-2/3
B.
-3/2
C.
0
D.
1
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Solution
The product of the slopes of the lines represented by ax^2 + bxy + cy^2 = 0 is given by c/a. Here, c = 2 and a = 3, so the product is 2/3.
Correct Answer: A — -2/3
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