Question(s) from Search: IIT

For the primitive differential equation
 

then  is

a) 3

b) 5

c) 1

d) 2

Consider the system of linear equations
 
 
 
Find the value of θ for which the systems of equations have non-trivial solutions.

The set of all solutions of the equation

Multiple choices with one or more than one correct answers
  then

a) x = f(y)

b) f(1) = 3

c) y increases with x for x < 1

d) f is a rational function of x

Given  and f(x) = cosx – x(x + 1). Find the range of f (A).

Multiple choices

If the first and  term of an Arithmetic Progression, a Geometric Progression and a Harmonic Progression are equal and their n^th term are a, b, c respectively then

a)

b)

c)

d)

Show that the value of  wherever defined, never lies between  and 3.

Let  where A, B, C are real numbers. Prove that if f(n) is an integer whenever n is an integer, then the numbers 2A, A + B and C are all integers. Conversely prove that if the numbers 2A, A + B and C all integers then f(n) is an integer whenever n is an integer.

Let  and  be three non-zero vectors such that c is a unit vector perpendicular to both the vectors a and b and the angle between the vectors a and b is  then
 is equal to

a) 1

b)

c)

d) None of these

Does there exist a Geometric Progression containing 27, 8 and 12 as three of its terms? If it exists, how many such progressions are possible?

The values of  lies in the interval .  .  .

If  and  then (gof)(x) is equal to

If 0 < x < 1, then  is equal to

The sum of integers from 1 to 100 that are divisible by 2 or 5 is

The minimum value of the expression  where  are real numbers satisfying  is

a) Positive

b) Zero

c) Negative

d) –3

Using the relation , or otherwise prove that

a) True

b) False

If A > 0, B > 0 and A + B = , then the maximum value of tan A tanB is ……….

a)

b)

c)

d)

Let  be non–coplanar unit vectors equally inclined to one another at an angle θ. If find p, q, r in terms of θ

Prove by vector method or otherwise, that the point of intersection of the diagonals of a trapezium lies on the line passing through the mid points of the parallel sides (you may assume that the trapezium is not a parallelogram)

True / False

Let  are unit vectors. Suppose that  and the angle between B and  then

a) True

b) False

2sinx + tanx > 3x where 0 ≤ x ≤

a) True

b) False

Let f(x) = (x + 1)² – 1, x ≥ −1 then the set {x : f(x) = f^-1(x)} is

a)

b) { 0, 1, −1}

c) {0, −1}

d) Ф

Suppose f (x) = (x + 1)² for x ≥ . If g (x) is the function whose graph is the reflection of the graph of f (x) with respect to the line y = x then g (x) equals

a) ,  0

b)

c)

d)

Let a, b, c be three positive real numbers and
 
Then tan θ = ………..

a) 0

b) 1

c) 2

d) 3

If X and Y are two sets and f : X  Y
If { f (c) = y, c ⊂ x, y ⊂ Y } then the true statement is

a)

b)

c) , a ⊂ X

d)