A relation on the set A = x : |x| < 3, x Z , where Z is the set of integers is defined by R = (x, y) : y = |x|, x -1 . Then the number of elements in the power set of R is:

JEE Main 2014 Mathematics question

A relation on the set , where Z is the set of integers is defined by . Then the number of elements in the power set of R is:

Answer: (2)

. Excluding x = −1, the admissible values are , giving $R = \{(-2, 2), (0, 0), (1,

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Question ID VK-104599