Given the functions f·g: ℝ → ℝ, where f(x) = x² - 1 and g(x) = 2x + 1.
(g·f)(2) is:
11.
13.
24.
7.
If logₓ y = 2 and xy= 125,
then the values of x and y are respectively.
25 and 5.
3 and 9.
9 and 3.
5 and 25.
The vertical asymptotes of the curve
y = 1 / (x-2)(x+3) are:
x = 3, x = -2.
x = 2, x = -3.
x = 2, x = 3.
x = -3, x = -2.
When the polynomial p(x) = ax³ + 5x² + 2x - 8 is divided by (x -1), the remainder is -3.
So a is:
2.
-2.
-4.
3.
The set of values of x for which
[ (x+1)² + 3 ] / [ (x+3)(x-2) ] < 0 is:
{x: -3 < x < 2 }.
{x: x < -3 or x > 2}.
{x: x ≤ - 3 or x > 2}.
{x: -3 ≤ x < 2}.
A function f: ℝ → ℝ is defined by:
f(x) = 4β + 4x, if x < 1 and f(x) = 4x - β² - 4 if x >1.
If f(x) has a limit at x = 1, the value of:
1.
Let p and q be statements. The compound statement ⊕ on the table could
p Λ q.
p ∨ q.
p → q.
p ↔ q.
Given the lines:
L₁: r = 3i - 2j + 4k + ∂(4i + 2j - 3k)
L₂: r = i + 3j + k + δ(8i + 4j - 6k)
L₃: r = 2i + 6j + 2k + β(i - 4j + 4k)
L₄: r = 4i + 12j + 4k - μ(i + 3j + k).
Which pair of lines are parallel?
L₁ and L₂.
L₂ and L₄.
L₁ and L₄.
L₂ and L₃.
A relation R defined on a non-empty set S is called a partial order if R is:
Symmetric, anti-symmetric and transitive.
Reflexive, anti-symmetric and transitive.
Reflexive, symmetric and anti-symmetric.
Reflexive, symmetric and transitive.
If ∑∞(r=1) m / 2(r-1) = 10, then m is:
5.
10.
15.
The first order differential equation obtained from the function
y = Ax + Inx is:
dy/dx = y - ln x + 1.
x dy/dx = y + ln x + 1.
x dy/dx = y - ln x + 1.
x dy/dx = y - ln (x + 1).
The shaded region represents
A' ∩ B.
(A ∪ B)'.
A ∩ B.
A ∩ B'.
A function f: ℝ → ℝ is given by:
f(x) = (x+6) / x² - 2x - 15.
The domain of f is:
ℝ - {-5, 3}.
ℝ - {-5, -3}.
ℝ - {3, 5}.
ℝ - {-3, 5}.
A curve is defined parametrically by x = 2t, y = 2/t.
The Cartesian equation of the curve is:
xy = 2.
xy = 4.
xy = 3.
xy = 1.
If r = i + 2j + 2k, s = -2i +3j + k,
then r x s is:
-4i + 5j - 7k.
-4i - 5j -7k.
-4i - 5j + 7k.
-4i + 5j + 7k.
Given that f(θ) = sin θ - √3 cos θ.
Expressing f(θ) in the form R sin(θ - α) where R > 0 and α an acute angle, we obtain f(θ) is:
√10 sin(θ - π/4).
2sin(θ - π/2).
2 sin(θ - π/3).
10 sin (θ - π/3).
If f(x) = x² + kx - 3 has a root in the interval [1, 2] then the range of k is:
-1/2 ≤ k ≤ 2.
k < -1/2 or k > 2.
k > 2.
k < -1/2.
Given that the sum and product of roots of the equation
2x² - 2x + q = 0 are equal, the value of q is:
-1/2.
1/2.
The sum of the first n terms of an arithmetic progression is n(2n+3).
The nth term of the progression is:
2n + 1.
4n - 1.
4n + 1.
6n + 1.
| (-5+10i) / (1+2i) |
√125.
6.
√5.
The line L has equation r = 5i - 8j + k + ∂(i + 3j + 2k) and the plane π has equation 2x + 2y - z = 5.
The sine of the acute angle between the line and the plane is:
(4√14) / 7.
(2√14) / 7.
(√14) / 7.
(3√14) / 7.
What is the result of d(3x + 2)⁴ /dx :
12x(3x + 2)³.
4/3 (3x +2)³.
12(3x + 2)³.
12(3x + 2)⁴.
The equation of the circle which passes through the origin and the points (2, 0) and (0, -4) is:
x² + y² - 2x + 4y = 0.
x² + y² + 2x - 4y = 0.
x² + y² + 2x + 4y = 0.
x² + y² - 2x - 4y = 0.
The area of the finite region bound by the curve y = 2x - 1/x and the lines x = 1 and x = 3 is:
8 - In2.
8 + In2.
8 + In3.
8 - In3.
If a root of the equation x² + 2x + 1 = 0 is also a root of the equation x³ - 2x² + 6x + k = 0, the value of the constant k is:
9.
-9.
-5.
A periodic function f, of period 4, is defined by
f(x) = x², 0 ≤ x < 2 and
f(x) = x + 2, 2 ≤ x < 4.
Then f(9) is:
81.
Two functions f·g: ℝ → ℝ are such that
f(x) = 2x - 1 and (f·g)(x) = x - 2.
Then g(x) is:
(x-2) / 2.
(x+1) / 2.
(2x-1) / 2.
(x-1) / 2.
The equation of the tangent to the curve,
y = 3x(2 - x²) at the point (1, 3) is:
3x + y - 6 = 0.
3x - y - 60.
3x - y + 6 = 0.
y - 3x - 6 = 0.
Simplifying
(sin 5x - sin x) / (sin 4x - sin 2x) gives:
2 cos 2x.
2 sin x.
2 sec x.
2 cos x.
The number of arrangements of the word ARREARS is:
420.
210.
840.
640.
In the expansion of √(3+x), the range of values of x for which the complete expansion is valid is:
-3 ≤ x ≤ 3.
-1 < x < 1.
-3 < x < 3.
-1/3 < x < 1/3.
Evaluating 1 + 1/3 + 1/9 + 1/27 + … gives:
40/27.
3/2.
1/3.
limx→∞( (4x² - 1) / (2x² + 1) ) is:
0.
∫⁴₁ ((x+3) / x) dx is:
4 + 3 ln 4.
3 + 4 ln 3.
4 + 4 ln 3.
3 + 3 ln 4.
If the matrix M is as shown, then its determinant is:
18.
-8.
-18.
The position vector of a particle at time t seconds is r, where r = [ (t² + 1)i + t³j ] m.
The vel of the particle when t = 2 is:
(2i + 12j)m /s.
(4i + 12j) m/s.
(4i + 6j) m/s.
(4i - 12j) m/s.
The extension a force of 20N produces in a spring of natural length 5 m whose modulus of is 150 N is:
3/2 m.
¾ m.
2/3 m.
½ m.
The velocity of a particle A relative to another B is (7i + 5j) m/s.
Given that the velocity of A is (8i + 6j) m/s.
The velocity of B is:
(-i -j) m/s.
(15i + 11j) m/s.
(i + j) m/s.
(15i - 11j) m/s.
Given that A and B are events with P(A) = 1/4 and P(A∪B) = 1/3 and P(A∩B) = 1/12. P(A|B) is:
⅔.
1/6.
A small sphere of mass 0.6 kg is moving on a horizontal table with a speed of 10 m/s when it collides with a fixed smooth wall perpendicular to the table surface. It rebounds with a speed of 15/2 m/s.
The coefficient of restitution between the sphere and the wall is:
5/3.
3/4.
4/3.
4/5.
Three particles of masses 5kg, 3 kg and m kg lie on the y-axis at the points (0, 4), (0, 2) and (0, 5) respectively.
The centre of mass of the system is at the point (0, 4).
The value of m is:
4.
A car wheel of radius 1/2 m is moving at a speed of 10/3 m/s.
Its angular speed in rad/s is:
20/3.
25/3.
16/3.
A car accelerates uniformly from a velocity of 10 m/s to 60 m/s in 6 seconds on a straight road.
The distance it covered is:
210 m.
200 m.
150 m.
215 m.
A box contains ten green and six white marbles.
A marble is chosen at random, its colour noted and it is not replaced.
This process is repeated once.
The probability that the marbles chosen are of the same colour is:
17 / 32.
13 / 32.
The engine of a car of mass 1,200 kg works at a constant rate of 69 kW up a road inclined at an angle sin⁻¹ (1/6) to the horizontal.
Given that the non-gravitational resistance to the motion of the car is 300 N and taking g as 10 m/s², the maximum speed of the car is:
30 m/s.
15 m/s.
25 m/s.
22 m/s.
The work done by a force F (i - 2j - 4k) N which moves its point of application from a point A with position vector rA = (3i - 4j) m to another point B with position vector rB = (-i - 6k) m is:
47 J.
12 J.
36 J.
-6J.
A particle decelerating to rest has its speed v m/s at time t seconds given by: v = 6t - ½ t².
The deceleration of the particle when v = 10 is:.
10 m/s².
-4 m/s².
-10 m/s².
4 m/s².
A particle of mass of 14 kg rests on a smooth horizontal table. It is connected by a light inextensible string passing over a smooth pulley fixed at the edge of the table to a particle of mass 6 kg which hangs freely.
Given that the acceleration of the system 3 m/s² when it is released from rests, the force exerted by the string on the pulley is:
82 N.
82√2 N.
42 N.
42√2 N.
A smooth sphere A of mass 6 kg travelling at 4 m/s travelling at 2 m/s in the opposite direction.
Given that the speed of B after impact is 2 m/s.
The kinetic energy of A impact is:
6 J.
48 J.
13.5 J.