44. The roots of the equation : is

Ans.

45.

Ans.

46. If , then represent the vertices of a/an

a) equilateral triangle b) isosceles triangle

c) right angled triangle d) none

Ans. None.

47. is a function from R - R, then f(x) is

a) injective

b) surjective

c) bijective d) none

Ans. None

48. Let be three vectors such that , and , and . If , then equals to

Ans. - 4

49. If , then is

Ans. 1

50. The period of the function is

Ans.

51.

Ans :

52. Ortho-centre of the triangle formed by the lines x + y =1 and xy = 0 is

Ans : ( 0, 0)

53. Equation represents

Ans. Pair of straight line.

54. Set of equations a + b - 2c = 0, 2a - 3b + c = 0 and a - 5b + 4c = is consistent for equal to

Ans . 0

55. Numerical value of the expression for
x = -3 is

Ans. 4

56. Coefficient of x in the expansion of is

Ans.

57. Assuming that no two consecutive digits are same the number of n digit numbers is

a) n! b) 9!

c) d)

Ans.

58. Real roots of the equation are

Ans. Does not exist.

59. is

Ans.

60. If , then equals

Ans.