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All India Engineering / Architecture Entrance Examination (AIEEE)

CBSE Guess > AIEEE > AIEEE Papers > 2009 > Maths

AIEEE 2009 Maths

Q. 28. Three distinct points A, B and C are given in the 2-dimensional coordinate plane such that the ratio of the distance of any one of them from the point (1, 0)to the distance from the point (-1, 0) is equal to  . Then the circumcentre of the triangle ABC is at the point




  2. (0, 0)





Sol:  

  

Answer: (3)

Q. 29. One ticket is selected at random from 50 tickets numbered 00, 01, 02, ……., 49. Then the probability that the sum of the digits on the selected ticket is 8, given that the product of these digits is zero, equals











Sol:  

  

Answer: (2)

Q. 30. Let be an implicit function of x defined x2x – 2xx cot y – 1 = 0. Then y`(1) equals

  1. -log2

  2. -1

  3.  1

  4. log2

Sol:  

  

Answer: (2)