Relations and Functions · Question 1

Let [ ] denote the greatest integer function. If the domain of the function f(x)= -1 ( x+[x]3 ) is [ , ), then 2+ 2 is equal to :

1. 2
2. 5
3. 10
4. 13

Let A=\1, 4, 7\ and B=\2, 3, 8\. Then the number of elements, in the relation R=\((a1, b1), (a2, b2)) ((A B) (A B)) : a1+b2 divides a2+b1\ is .

If the domain of the function f(x)= (0.6) ( | 2x-5x2-4 | ) is (- , a] \b\ [c, d) (e, ), then the value of a+b+c+d+e is .

Let A=\2, 3, 4, 5, 6\. Let R be a relation on the set A A given by (x, y)R(z, w) if and only if x divides z and y w. Then the number of elements in R is .

If the domain of the function f(x) = (10x2 - 17x + 7) (18x2 - 11x + 1 ) is (- , a) (b, c) (d, ) - \e\, then 90(a + b + c + d + e) equals:

1. 170
2. 316
3. 177
4. 307

The sum of all the real solutions of the equation (x+3) (6x2 + 28x + 30 ) = 5 - 2 (6x+10) (x2 + 6x + 9 ) is equal to :

1. 1
2. 4
3. 0
4. 2

If the domain of the function f(x) = -1 ( 5 - x3 + 2x ) + 1 e(10 - x) is (- , ] [ , ) - \ \, then 6( + + + ) is equal to

1. 66
2. 68
3. 70
4. 67

Let f(x) = [x]2 - [x + 3] - 3, x R, where [.] is the greatest integer function. Then

1. f(x) = 0 for finitely many values of x
2. f(x) < 0 only for x [-1, 3)
3. 02 f(x) dx = -6
4. f(x) > 0 only for x [4, )

Let the domain of the function f(x) = 3 5 (7 - 2 (x2 - 10x + 85 ) ) + -1 ( | 3x - 717 - x | ) be ( , ]. Then + is equal to :

1. 12
2. 8
3. 10
4. 9

The number of elements in the relation R = \(x, y) : 4x2 + y2 < 52, x, y Z \ is

1. 86
2. 67
3. 89
4. 77